JEPJournal of Environmental Protection2152-2197Scientific Research Publishing10.4236/jep.2017.810075JEP-79324ArticlesEarth&Environmental Sciences Public Perception Survey Study on Air Quality Issues in Wuhan, China HaiyingLiu1*MikeKobernus1HongLiu2Hubei Environmental Monitoring Centre Station (HEMC), Wuhan, ChinaDepartment of Environmental Impacts and Sustainability, Norwegian Institute for Air Research (NILU), Kjeller, Norway* E-mail:hyl@nilu.no(HL);1409201708101194121828, August 201723, September 2017 26, September 2017© Copyright 2014 by authors and Scientific Research Publishing Inc. 2014This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/

In 2013, a survey on air quality (AQ) was conducted in Wuhan, China. The aim was to investigate public awareness of air pollution, and its epidemiological effect. This survey targeted both suburban and central city regions of Wuhan city, between August and December of 2013, where it engaged 1225 participants. Approximately 65% perceived AQ in Wuhan to be “bad”. Over 95% recognized a causal association between air pollution and human health. About 65% were unaware of any action taken by the government to mitigate the air pollution situation. 84% indicated that the government should shut down highly polluting enterprises, while 95% expressed willingness to reduce private use of vehicles if required. The results demonstrate that the citizens of Wuhan are concerned about air pollution issues, and agree that improving AQ is the obligation of all citizens. Further, they called for concrete actions to improve AQ. The survey emphasized the need for better education and more activities to raise environmental awareness. The innovative aspects of this survey were the exploration of participants’ perceptions of AQ issues and the survey results may influence local government to impose stricter regulations, and to develop more effective programs involving citizens.

Air Quality Environmental Awareness Human Health Public Engagement Public Perception1. Introduction

Worldwide, air pollution represents the greatest environmental risk to human health. According to the World Health Organization (WHO), 11% of deaths were caused by air pollution around world in 2012 [1] . In China, air pollution is a severe problem and has increasingly become a major public health hazard [2] [3] [4] despite efforts to control it [5] [6] . For instance, high levels of smog and haze can often be encountered in many cities across China [2] [7] .

In order to provide cost-effective control measures to improve air quality (AQ), China has sought inspiration and support from European legislation and policy experiences when designing its environmental policies, in order to benefit from foreign experience, proven methodologies and state-of-the-art equipment. One of these proven tests was the EU-China Environmental Governance Programme (EU-China EGP) project, Hubei-AQ.info (Hubei AQ information and early warning system), launched in 2012 [8] . The Hubei-AQ.info project had a general aim to establish an integrated AQ information and early warning system for nine cities in Hubei province, providing AQ information to the public based on the assessment of public demand. One of the expected results of the project was to increase public awareness of AQ, and enhance the public’s understanding of environmental information. Currently, AQ information is presented to the public via a daily AQ Index (AQI). However, the links among AQI, concentration levels and health impacts are not widely understood by the public. Therefore, it is important to recognize how local residents perceive and understand air pollution and its potential impact on human health. For this reason, a questionnaire was designed and distributed amongst a representative number of the inhabitants of Wuhan in order to determine their level of understanding of AQ information, and the relation between AQ and health. This initiative has provided information for data providers (e.g., Hubei Environmental Monitoring Centre Station (HEMC)), decision makers (local government) and data consumers (e.g., public). The survey results can now be used to support the design of a public AQ information web solution that will address public concerns. Such a solution should offer the possibility to not only access information, but also to send formal requests to the web administration. More effective communication between public and the information providers will result in a better public understanding of AQ.

Recently, several studies have explored attitudes and behaviors in response to air pollution in China [2] [9] [10] [11] [12] [13] . These include public knowledge and perception of air pollution and smog in the Jing-Jin-Ji region [9] and Ningbo [10] , residents’ perception of AQ, pollution sources, and air pollution control in Nanchang [2] [11] , Shanghai [12] and Jinchuan [13] , as well as a survey on perception of air pollution and its health effect in Wuyuan [13] , etc. These surveys have found that respondents that are less satisfied with local AQ are more likely to note air pollution and rate it as a serious local problem [12] . However, public opinion tends to deviate when faced with a public crisis [10] . Media are the main source for dissemination of air pollution information [10] , and participants agreed that improving AQ is essential and should be the responsibility of both the government and individual citizens, but the number of people willing to change their behavior is small [13] . In addition, the difference in public perception of air pollution and their environmental awareness level is influenced by their environmental knowledge [2] [11] , and is further influenced by their socio-economic status and family health experience, as well as proximity to the pollution source [16] . The findings from these studies suggest a need for the government to improve awareness of air pollution issues, and to implement AQ control measures more effectively [2] [13] [14] .

Based on these studies in China and the objective of the Hubei-AQ.info project, in this paper we present an overview of the work performed in the Wuhan AQ survey aimed to address the following questions: 1) How and to what extent does the public perceive AQ in their surroundings? 2) To what extent do participants understand the causes of air pollution and their related health effects? and 3) How and to what extent does individual education, economic, social and ecological conditions influence their perception on AQ issues? The AQ survey covered the following objectives: 1) ascertaining public perception on AQ in Wuhan, and awareness of the relationship between AQ and health, as well as sources of air pollution, understanding mitigation measures from the government and their attitude to the improvement of AQ; 2) engaging the public in the survey study, promoting participation in AQ-related environmental monitoring, and skill development; 3) improving communication between AQ information holders and the public; 4) exploring what environmental information is useful for the public; 5) providing recommendations on AQ-related information to the public; and 6) providing recommendations on AQ-related policies to decision and policy-makers. All of these objectives serve the main aim of raising environmental awareness, and determining public attitudes and perception for improving the environmental situation in Wuhan.

2. Materials and Methods2.1. Study Area

The study was performed in Wuhan city (30˚35’35.16"N and 114˚18’19.41"E). Wuhan is the capital of Hubei Province, and has a subtropical monsoon climate. In terms of population and area, Wuhan is the largest city in central China. It has a population of over 10 million and covers 8494.41 km2 [15] . At the time of writing, critical energy sources were coal, crude oil, coke, and electricity. This causes considerable pollution. In 2012, the total discharge of SO2 was 105,800 tons and the annual average of SO2 in ambient air was 0.030 mgm−3 [16] . However, in addition to SO2, Wuhan also suffers from NOx and PM pollution. According to You (2014) [17] , during the first six months of 2013, Wuhan managed only 47 attainment days, where pollution was within limits. All other days were over, due to PM2.5 pollution. The official monitoring results confirm that Wuhan has a serious PM2.5 pollution [17] . The project aimed to target a heterogeneous sample size with diverse opinions, different socio- and economic backgrounds. To accomplish this, the 13 districts selected in Wuhan, which include seven central districts (i.e., Jiang An, Jiang Han, Qiao Kou, Han Yang, Wu Chang, Hong Shan, Qing Shan) and six suburban districts (i.e., Dong Xi Hu, Cai Dian, Jiang Xia, Huang Po, Xin Zhou and Han Nan) (Figure 1) [18] . The suburb

has a lower population than the city center. In terms of urban functions and land use characteristics, Jiang An, Jiang Han and Qiao Kou are the commercial and financial canter, Han Yang is the industrial center, and Wu Chang is the educational and cultural center. Hong Shan is the most populous of all the districts with 1,549,917 population [19] .

2.2. Study Population, Sampling Strategy and Implementation Approach

Our survey targeted at any public who might be interested in AQ issues. The survey was originally made in English, and then translated into Chinese for better public participation. The survey were distributed to the public, age from 14 to 75, in each of the 13 districts via QQ, microblog, e-mail, seminar, street and district questionnaire distribution.

We provided two methods to access the questionnaires: 1) Online: In order to facilitate participants to answer the questions, online access to the questionnaire was provided through the web-based project portal (http://www.hubei-aq.info); 2) Hard-copy: Printed copies were directly distributed on the street and in the districts of those who preferred to respond to the questionnaire on paper.

We implemented the survey through two types public participation approach: 1) Active (volunteered participation) and 2) Passive (motivated participation). The implementation period was five months, from August to December of 2013. Among the 1500 questionnaires submitted, 1225 were completed and included in the study analysis. Within 1225 valid questionnaires, 1000 were collected online by motivated approach (i.e., project paid 20RMB for each participant to answer questions), and 225 through volunteered online and offline participation.

2.3. Questionnaire

The AQ information questionnaire was designed as a “tool” for collecting and recording information and determining the basic attitudes/opinions of the public on AQ-related issues. It consisted of a series of questions, clear instructions, the alternative answers and the space for free answers. It was designed based on the current understanding of the cause-effect relationship (Driving force-Pres- sure-State-Exposure-Effect-Action (DPSEEA) framework) [18] of air pollution and its subsequent impact on the environment, ecosystems, society, economy and human health. It adopted a cross-sectional survey method, which consisted of nine parts. The first part related to the personal information of the participants. The second addressed the participants’ basic understanding of AQ-related information. The next six parts consisted of questions regarding air pollution’s driving force (D), pressure (P), state (S), exposure (E), effect (E) and action (A). In the last part, there was a field for final remarks and the participants’ personal desires regarding AQ-related issues. The questions included in the survey required either single, or multiple-choice answers, with some having optional free text fields. The questionnaire took approximately 15 - 20 minutes to answer all the questions.

2.4. Quality Control

The questionnaire was designed to take into account local conditions in Wuhan while complying with the research needs of practitioners from the Norwegian Institute for Air Research (NILU) and the Hubei Environmental Monitoring Centre Station (HEMC). HEMC practitioners collected the survey data and were trained by NILU in survey methods. Before launching the survey, HEMC’s employees and their friends and family members were chosen to participate in a pre-launch test, to ensure the easy understanding of the questionnaire. The questionnaires received online and offline were organized and numbered, with unqualified questionnaires being removed. Double entry was performed by two persons in separate files and then crosschecked twice for data accuracy. A final verification step was then taken by double-checking the original questionnaire, if there was a data mismatch between the two entries.

2.5. Statistical Analysis

The survey was input and stored in a professional online survey platform, Sojump [20] and R Statistical Software was used for analysis. Demographic characteristics of participants, and their perception of AQ and health, were depicted with descriptive statistics. Multiple regression analysis was used to assess the associations between participants’ knowledge and awareness level on AQ-related issues and their commonality/differences amongst participants’ gender, age, education level, occupation, living district and area. Significance level was set at p < 0.05.

3. Results3.1. Participants Demographic Information

Table 1 depicts the participants to the introductory questions. Among the 1225 participants, 46% were male and 54% female. Most were between 18 - 45 (76%), had college-level education or higher (94%), had not been/are not involved in

General demographic characteristics of the participants (n = 1225)
FactorsPercentage (%)
GenderMale45.7
Female54.3
Age<1815.1
18 - 2546.2
25 - 4529.7
45 - 608.6
> 600.4
Education levelPhD3.3
Master14
Bachelor61.9
Junior college15
High school or technical secondary school5.4
Middle school0.4
Job/occupationAdministrative organizations, public institution19.3
Enterprise22.3
Freelancer5.1
Farmer0.6
Student50
NGO0.2
Other2.6
Involving and/or has been involved in air pollution related workYes, I am currently involved in air pollution related projects at work9.6
Yes, air pollution used to be one of my working areas6.9
No83.4
Living districtCaidian1.3
Dongxihu2
Hannan0.6
Hanyang4.7
Hongshan29.6
Huangpo0.8
Jiangan5.6
Jianghan6.3
Jiangxia12.8
Qiaokou5.8
Qingshan3.6
Wuchang24.8
Xinzhou2.1
Living areaSuburban area41.4
Central city area58.6

any air pollution related activities or work (83%) and live in an central city area (69%, Figure 1), e.g., Hong Shan (30%) and Wu Chang (25%). Almost half of participants were students, followed by participants employed either at various enterprises, or from administrative organizations and/or public institutions.

3.2. Participants Basic Knowledge on Air Quality Issues

Table 2 presents the results linking to the participants’ basic understanding of AQ-related information. Nearly 96% knew what air pollution is. Around 94% did care about AQ issues in their surroundings. About 68% thought AQ was bad in Wuhan and 30% believed AQ in Wuhan to be moderate. Most concerned about PM2.5 (84%), SO2 (57%) and HCHO (42%) as the major air pollutants. 77% showed their interest in AQ information and 15% would like to learn more about it.

3.3. Participants Perception on Air Quality―Driving Forces and Pressure

With regard to the questions linking to the main driving forces and pressure for

Participants’ basic understanding of the air quality-related issues
Please answer the following questionsPercentage (%)
Do you know what air pollution is?Yes96
No4
Do you care about the AQ issues in the area you live, work or study?Yes94
No6
Do you think the AQ in Wuhan is good or bad?Good2
Moderate30
Bad68
What are the main air pollutants you are most concerned? (multiple choice)PM1035
PM2.584
SO257
NO236
CO35
O324
HCHO42
Pb29
Other (e.g., dust)2
I don’t know0.4
Are you interested in AQ information and do you want to learn more about it?Yes77
No8
I want to learn more15

air pollution, most participants chose transportation needs (91%), economic development (90%), energy demand (66%) and population increase (65%) as the main driving forces (Figure 2), and believed that waste release/emissions (91%), construction (77%) and production (70%) were the major human activities that put pressure on the environment (Figure 3).

3.4. Participants Perception on Air Quality―State

For the questions that can be linked to the state indicator on AQ, we can see (Table 3) that around 40% of participants knew about the AQI in China, with most of them accessing AQ information through websites, mobile phone software, TV and newspaper. While over 50% were not aware that there is a real- time AQ release system in Wuhan, 44% were aware, but had never or rarely visited it. Around 60% were interested in the information on air pollutant concentrations, AQ grade, and AQ forecast. More than 70% chose forecasts on environmental quality, meteorological conditions connected to air pollution, and forecast of AQ haze and visibility as the most demanded AQ services. Around

Participants’ general perception for air quality: State
Please answer the following questionsPercentage (%)
Do you know the AQ Index in China?Yes40
No60
I do not know7
Where do you usually access the AQ information in Wuhan? (multiple choice)Website80
Newspaper52
TV news54
Radio30
Mobile phone applications57
Outdoor screen15
I do not care such information1
Other<1
Do you know or have you visited the real-time AQ release system that published by the government in Wuhan?I do not know it at all51
I know it but I have never visited it22
I know it but I have rarely visited it22
I know it and I often visit it4
What type of the AQ information are you really interested in it? (multiple choice)Air pollutant concentration56
Change in tendency of the air pollutant concentration43
Air quality grade64
Air quality forecast for the next 24 hours61
Other1
Could you please choose the AQ services you are most interested in it? (multiple choice)Environment quality forecast70
Forecast on the meteorological condition of air pollution70
Forecast on the haze and visibility75
Forecast on sand storm21
Other<1
Are the current AQ Index and real-time AQ release system in Wuhan useful for you?Useful45
Useless14
I don’t know35
It doesn’t matter for me7
Do you trust the results of the real - time AQ release system in Wuhan?Yes43
No31
I don’t know27
Are you satisfied with the current AQ release/disclosure information?Yes39
No44
I don’t know16
In China, AQ information to the public is available from Chinese government, NGOs and Foreign Embassies. Could you please tell which one you trust most? (the one ranking the first means the highest reliability for you)Chinese government, NGOs, Foreign Embassies in China25
Chinese government, Foreign Embassies in China, NGOs22
NGOs, Chinese government, Foreign Embassies in China14
NGOs, Foreign Embassies in China, Chinese government13
Foreign Embassies in China, Chinese government, NGOs10
Foreign Embassies in China, NGOs, Chinese government15
Other1

45% thought the current AQI and real-time AQ information provide useful information for their daily life, but most were not satisfied with the quality of such information. 25% trust most the AQ information released by the Chinese government, followed by NGOs and foreign embassies in China, while around 15% only trust the AQ information released by the Foreign Embassies (i.e., US Embassy), followed by NGOs and the Chinese government.

3.5. Participants Perception on Air Quality―Exposure and Effect

For the question linking to the exposure routes (i.e., questions linking to how people are exposed to toxic air pollutants that can pose health risks), approximately 77% of the participants knew that breathing polluted air was the most direct way to be exposed to air pollution. For other routes of exposure, 12% chose skin contact with contaminated soil, dust, or water, 8% chose drinking water contaminated by toxic air pollutants (Table 4).

For the questions linked to environmental health effects, 96% knew that air pollution can have negative effects on the environment, economy, society and health, and 85% felt uncomfortable or sick when they breathe polluted air (Table 4). Almost all the participants knew that exposure to toxic air pollutants can

Participants’ general perception for air quality: Exposure and Effect
Please answer the following questionsPercentage (%)
Do you know how people expose to the toxic air pollutants that can pose health risks? (multiple choice)I don’t know4
Breathing contaminated air77
Drinking water contaminated by toxic air pollutants8
Eating contaminated food5
Touching contaminated soil, dust, or water12
Ingesting contaminated soil5
Other<1
Do you know that air pollution can cause negative effects on environment, economy, social and health?Yes96
No3
I don’t know1
Do you feel sick or uncomfortable when air quality is bad?Yes85
No2
Feeling is not obvious13
Could you please tell us which human organs can be affected by air pollution? (multiple choice)Pulmonary98
Cardiac45
Vascular47
Neurological36
Other3

cause pulmonary disease, and around 45% knew that exposure to polluted air can cause cardiac and vascular disease as well (Table 4).

3.6. General Perception on Air Quality―Actions

When the participants were asked about their opinion on governmental actions and their individual actions toward improving AQ (Table 5), around 49% said that public transport (i.e., bus) was their major transportation mode. Only 7% used private cars, and 2% used motorcycles. This may be influenced by the fact that most of the participants were students.

Nearly 65% used AQ information as a reference for their outdoor activities. Over 80% strongly opposed Chinese social development modes, i.e., developing economy first and protecting environment second. Most of the participants expressed their willingness to reduce air pollution through individual behavioral changes, e.g., thinking seriously before using a private car, using public transportation, reducing their energy consumption and switching to clean renewable energy sources at home, stop burning solid fuels, etc. It is very interesting to note that 65% were not aware of any actions that have been implemented in Wuhan to help reduce air pollution, or did not believe that any action had been implemented at all. Only 15% had air purifiers at home, while 40% planned to buy one. 45% did not plan to buy an air purifier. This result may also be influenced as many participants were students living in shared spaces.

Furthermore, several participants suggested various measures to improve AQ in Wuhan, such as resettling or closing enterprises with high pollution, high energy consumption and outdated production methods, and restricting the use of motor vehicles and increasing the use of environmentally-friendly vehicles. A few participants recommended that cleaning the road with water to remove the dust from construction activities, limiting private cars’ driving time, and restricting the number of private cars purchased. Some participants called for strengthening the implementation of pollution discharge regulations, air pollution control and improving AQ, closing all barbecue coal stands on the street throughout the city, and launching and implementing new pollution regulations for newly started high pollution projects.

3.7. Final Remarks/Comments from the Participants

Nearly 95% of the participants expressed their willingness to follow environmental contingency plans if the government required them to do so. 87% believed that they have attained new knowledge from our survey on air pollution. After our survey, these participants began paying attention to AQ-related information released from the government, and from other sources. Furthermore, they have learned personal/individual behaviors can have a positive/negative impact on AQ and health effects. In addition, these participants have learned that our Hubei-AQ project and local “1 + 8” city cluster haze monitoring projects are taking measures on AQ in Wuhan, and strongly calling for more

Participants’ general perception for air quality: Action
Please answer the following questionsPercentage (%)
What is/are your major transportation mode(s) for your daily life?Foot24
Bicycle6
Bus49
Subway11
Private car7
Motorcycle2
Other1
Will the ambient air conditions serve as reference for your outdoor activities?Yes65
No35
Do you support Chinese traditional social development mode-developing economy first and protecting environment second?Yes17
No81
I don’t care2
Have you ever considered reducing air pollution through any of the following individual behavioral changes? (multiple choice)Think seriously before using your car for an outdoor journey, and try best to use public transportation78
When doing the shopping or going to work, think about car sharing35
Turn off your car engine while stationary27
Maintain your car properly17
Always try to reduce or slow down your speed when you drive12
Buy green and efficient car49
Reducing your energy consumption at home or switching to clean renewable energy sources, stop burning solid fuels63
I have never considered to reduce air pollution through changing my own behavior3
Other1
Are you aware of any of actions that have been implemented in Wuhan to help reducing the air pollution?Yes32
No65
I don’t care3
Do you have air purifier at home?Yes15
No, but plan to buy40
No, do not plan to buy45
If the area you live requires the environmental contingency plans, what kind of policies or intervention measures do you suggest the government to take or implement? (multiple choice)Close the highly polluting enterprises84
Restrict the use of motor vehicles63
Spray water to remove the street dust66
I do not have any suggestion at all2
Other2
If the area you live requires the environmental contingency plans, and the government requires you to reduce the private car driving time, do you accept or refer to follow?Yes, I accept it95
No, I will not accept it5

such environmental awareness raising activities to reach the wider public in Wuhan. Some of the participants also commented that the survey was easy to understand, but they hope that through this questionnaire more information will be available on the HEMC and/or Wuhan Environmental Protection Bureau (EPB) web regarding the local actions and real-time AQ reports.

3.8. Difference of the Participants Perceptions toward Air Quality, Health Effects and Governmental Actions

Results from a multivariate regression analysis of factors associated with the participants’ knowledge and awareness level of AQ are presented in Table 6. Participants’ perception towards AQ levels was found to be negatively associated (β = −0.13, p = 0.03) with the participants’ living area. Participants were living in the central city area ranked AQ worse when compared to participants living in suburban area (Table 7). Farmers knew less about air pollution and its health effects when compared to other types of participants (β = −0.24, p = 0.03) (Table 8). Participants who were 25 - 45 years old were the most likely to have a high awareness level of government actions compared to other age groups (β = 0.297, p < 0.0001), while those participants with middle school (β = −0.51, p = 0.03) and high school (β = −0.17, p = 0.01) education and occupations as students (β = −0.18, p < 0.0001) have a low awareness level of government actions (Table 9). Participants’ willingness to change their behavior was found to be positively associated with gender (β = 0.04, p = 0.002) and education (β = 0.13, p = 0.03) (Table 10). Participants with age 25 - 45 and occupation at public and govern mental organizations have a higher number of air purifiers at home, or were more willing to buy an air purifier compared to other age groups and occupations, while high school students have the lowest number of air purifiers at home or were not willing to buy an air purifier (Table 11).

4. Discussion

Currently, there are several AQ-related researches being conducted in China. Historically however, the results of such research have limited penetration into the public sphere, and the public are largely unaware of them. Furthermore, the literacy required to fully comprehend research results has not been formalized in China. In many countries, the relationship between health and AQ has been thoroughly studied and education on environmental health amongst university students is prevalent. A study conducted in the USA found that environmental health education in the community was conducive to forming good environmental health habits. These actions support environmental policies and participation in environmental health related research activities and will be especially useful in protecting public health by increasing the public’s awareness of environmental protection [12] . Therefore, it is necessary to strengthen AQ knowledge and its potential effect on university students, the government, and relevant departments, in order to increase efforts in improving AQ in China.

Results from a multivariate regression analysis of factors related to the participants’ knowledge and awareness level about air quality in Wuhan
FactorsPerception toward air quality levelKnowledge about air pollution and its heath effectAwareness for government actionsWillingness to change the behaviorsAir purifier needs at home
βp valueβp valueβp valueβp valueβp value
GenderIntercept1.69<0.00012.95<0.00012.28<0.00011.03<0.00011.73<0.0001
Male0.020.78−0.030.100.010.780.040.002−0.080.06
Age18 - 25−0.010.94−0.020.260.020.60−0.010.82−0.090.12
25 - 450.050.680.030.720.30<0.0001−0.010.540.40<0.0001
45 - 60−0.050.750.000.96−0.010.850.020.770.180.05
>60−0.620.270.050.680.130.67−0.050.640.360.36
EducationMiddle school0.100.810.060.67−0.510.03−0.040.66−0.330.30
High school0.040.80−0.030.53−0.170.010.040.19−0.220.02
Junior college−0.090.29−0.010.76−0.060.210.010.90−0.070.25
Master−0.090.380.030.28−0.030.580.030.13−0.020.83
PhD−0.410.140.060.63−0.060.690.130.03−0.230.27
OccupationFarmer0.030.97−0.240.03−0.250.21−0.040.45−0.430.10
Freelancer0.140.31−0.040.39−0.110.150.010.960.000.96
Public or governmental organization−0.040.710.020.840.070.250.010.670.250.00
Student−0.010.93−0.020.96−0.18<0.00010.010.99−0.32<0.0001
Other−0.020.90−0.060.33−0.090.37−0.010.970.070.59
Living districtDongxihu0.350.270.130.17−0.270.120.040.53−0.220.35
Hannan0.110.70−0.010.94−0.110.630.001.00−0.290.38
Hanyang0.110.700.080.33−0.070.630.001.00−0.280.18
Hongshan−0.140.570.070.34−0.090.540.070.20−0.350.06
Huangpo0.310.430.130.26−0.300.160.001.00−0.500.08
Jiangan0.060.840.030.69−0.120.440.050.40−0.220.29
Jianghan0.020.940.030.74−0.170.250.030.61−0.210.29
Jiangxia0.170.510.080.31−0.140.240.050.41−0.330.08
Qiaokou−0.180.530.080.37−76.000.640.050.39−0.300.17
Qingshan0.190.54−0.010.88−0.110.510.030.65−0.210.35
Wuchang0.050.850.100.18−0.150.290.030.60−0.310.09
Xinzhou0.210.520.080.440.100.590.060.44−0.330.18
Living areaCentral city area−0.130.030.010.68−0.040.270.010.680.020.71
 Demographic characteristics of the participants’ general perception toward air quality level
Characteristics of the participantsWhat level of the AQ in Wuhan do you perceive in general?
I do not know (%)Bad (%)Moderate (%)Good (%)
GenderFemale25101
Male04510
Age<1801600
18 - 2524510
25 - 4502701
45 - 600900
>600000
Education levelMiddle school0000
High School0600
Junior college01500
Master25911
Bachelor01300
PhD0300
OccupationEnterprise12001
Farmer0000
Freelancer0500
Public and governmental organization01810
Student05100
Other1100
Living districtCaidian0100
Dongxihu0110
Hannan0000
Hanyang0320
Hongshan02380
Huangpo0000
Jiangan0420
Jianghan0420
Jiangxia0860
Qiaokou0310
Qingshan0210
Wuchang01580
Xinzhou0110
Living areaSuburban area020120
Central city area045121
 Demographic characteristics of the participants’ general knowledge about air pollution and its heath effect
Characteristics of the participantsDo you know that air pollution can cause negative health effects?
Yes (%)No (%)I do not know (%)
GenderFemale4711
Male3621
Age<181510
18 - 254211
25 - 451900
45 - 60600
>60000
Education levelMiddle School000
High School500
Junior college1300
Bachelor5421
Master900
PhD100
OccupationEnterprise2000
Farmer000
Freelancer500
Public and governmental organization700
Student4721
Other200
Living districtCaidian100
Dongxihu200
Hannan100
Hanyang500
Hongshan3010
Huangpo100
Jiangan500
Jianghan600
Jiangxia1400
Qiaokou300
Qingshan300
Wuchang2200
Xinzhou200
Living areaSuburban area3110
Central city area6521
 Demographic characteristics of the participants’ general awareness for government actions
Characteristics of the participantsDo you aware of any actions have been implemented in Wuhan to reduce the air pollution?
I do not care (%)I do not know (%)I know (%)
GenderFemale13215
Male22313
Age<180114
18 - 2513212
25 - 450910
45 - 60142
>60000
Education levelMiddle School000
High School041
Junior college194
Bachelor23519
Master063
PhD010
OccupationEnterprise1119
Farmer000
Freelancer032
Public and governmental organization044
Student23612
Other011
Living districtCaidian100
Dongxihu200
Hannan010
Hanyang060
Hongshan0310
Huangpo010
Jiangan060
Jianghan060
Jiangxia0140
Qiaokou004
Qingshan003
Wuchang0023
Xinzhou002
Living areaSuburban area4290
Central city area03632
 Demographic characteristics of the participants’ willingness to change the behaviours
Characteristics of the participantsIf the area you live requires the environmental contingency plans, and the government requires you to reduce the private car driving time, do you accept?
I accept (%)I do not accept (%)
GenderFemale471
Male353
Age<18141
18 - 25432
25 - 45191
45 - 6060
>6000
Education levelMiddle School00
High School50
Junior college131
Master542
Bachelor91
PhD10
OccupationEnterprise201
Farmer10
Freelancer50
Public and governmental organization70
Student472
Other20
Living districtCaidian10
Dongxihu20
Hannan10
Hanyang60
Hongshan292
Huangpo10
Jiangan50
Jianghan60
Jiangxia141
Qiaokou30
Qingshan30
Wuchang221
Xinzhou20
Living areaSuburban area311
Central city area643
 Demographic characteristics of the participants’ air purifier needs at home
Characteristics of the participantsDo you have air purifier at home?
I do not have, but not plan to buy (%)I do not have, but plan to buy (%)I have (%)
GenderFemale20217
Male18145
Age<18762
18 - 2523183
25 - 45586
45 - 60231
>60000
Education levelMiddle School000
High School321
Junior college661
Bachelor24239
Master441
PhD100
OccupationEnterprises7104
Farmers000
Freelancers221
Public and governmental organizations233
Student27204
Other111
Living districtCaidian010
Dongxihu110
Hannan000
Hanyang221
Hongshan15124
Huangpo000
Jiangan231
Jianghan321
Jiangxia762
Qiaokou120
Qingshan111
Wuchang10103
Xinzhou110
Living areaSuburban area14144
Central city area302710

The participants of the Wuhan study were mainly composed of university students and workers either from enterprise or from public and governmental organizations and were comprised of mainly young people (91% under 45 years). This represents the age structure of the general population in Wuhan (e.g., 0 - 14 (9.98%); 15 - 64 (81.89%); 65 (8.13%)) [21] . Such results were also highlighted in a study of public perception in the Jin-Jing-Ji region in China [19] .

Another finding was that more participants with college-level education or higher (94%) took the survey than participants with a lower level education. Thisis contradicted by the education structure of the general population in the city (e.g., 14% with college-level or higher, 23% with high school education, 37% with middle school education, and 26% with only preliminary school education) [22] . Most participants lived in a central city area (58.6%). This reflects the population distribution of the general population in Wuhan with 65% urban citizens [23] . Our results showed that most participants (83%) had not been/are not involved in any air pollution related activities or work. This may indicate that the public awareness level is relatively high already.

The survey achieved its purpose in quantifying the participants’ knowledge of air pollution and its effect on health in Wuhan. For example, nearly 68% of participants believed that AQ in Wuhan was bad, and this appeared to be consistent with the actual AQ situation in the city [24] . The official data on the annual average PM2.5 concentrations published by the Ministry of Environmental Protection (MEP) for 2013 in Wuhan was 88.7 ug/m3. This is 1.8 times higher than the national standard (which is 35 ug/m3) and the average daily PM2.5 level was 339 ug/m3 [24] . However, 30% believed that AQ in Wuhan was moderate. Our results indicated that this difference between the participants’ understanding with the actual AQ situation was the result of one factor, i.e., participants’ living area, but not factors of the participants’ gender, age, education level and occupation (Table 4). Participants living in the central city area ranked AQ worse when compared to participants living in the suburban area (Table 7). This is consistent with the results from other studies that showed that participants’ perception of AQ is related to proximity to the pollution sources [13] .

Analysis of air pollution sources indicates that the majority of participants believed that bad AQ was due to motor vehicles, waste burning, roads and building construction, and industrial sources/manufacturing facilities. These results are generally consistent with findings from several recent reports [25] [26] [27] . Further, 64% of participants were concerned about the AQI in Wuhan (Table 3), which is also consistent with finding from others AQ survey studies [10] .

There is real time AQ information released by the HEMC, including the AQI, and this information was open to the public one year prior to the survey. However, only 22% of participants were aware of this. Consequently, we need to focus on future public health education programs to strengthen knowledge and understanding of AQI, and where to find AQI information in order for it to be used by citizens for planning their daily activities.

80% of participants indicated that they access Wuhan’s AQ information via the Internet, followed by mobile App and TV (Table 3). These channels are vital to disseminate AQ information and could play a major role in informing citizens of environmental pollution in real-time. Similar AQ information access, including TV and Internet resources, have been identified in another survey on public attitudes and behaviors towards ambient air pollution and health in Ningbo, China [10] .

The survey showed that most participants (>96%) believed good AQ to be important, demonstrating that the public understands the association between AQ and human health which was also one of the major findings from the public perception of air pollution and health effects in Nanchang [2] [11] and Wuyuan [14] , China [2] . In particular, 85% of participants indicated that they felt sick or uncomfortable when AQ was bad which aligns with the findings from another AQ survey in the Jin-Jing-Ji region where people felt air pollution affected their health [9] . Moreover, our results showed that farmers have less knowledge of air pollution and its health effects compared to students and people working in public and governmental organizations (Table 4). This may indicate that more awareness raising activities towards public with low education levels is acquired.

The Wuhan government has made several initiatives to improve AQ, such as upgrading and/or phasing out coal-powered boilers, prohibiting fireworks [10] , converting the city bus and taxi fleets to liquefied petroleum gas (LPG) and compressed natural gas (CNG), and tightening requirements for PM caused by construction companies, etc. [28] . However, from our study, 65% of participants were not aware of such actions or did not believe that the government spent enough on environmental protection (Table 5). Our results showed that age, education and occupation were the main factors affecting participants’ awareness of government actions (Table 4). Participants who were 25 - 45 years old were the most likely to have a high awareness level of government actions, while those participants with middle school and high school education and occupation as student had a low awareness level of government actions. This may indicate that policy level discussions mainly take place amongst policy makers, research and development institutes and others. However, the public, as a major stakeholder, is overlooked in the policy development strategy. This suggests a need for more effective mechanisms to disseminate air pollution and abatement measures to the public, as awareness is one of the key factors to help mitigate health risks associated with air pollution. The similar knowledge gaps, the need for improving the environmental awareness, and the calling for increasing government funding to improve AQ were also identified in others AQ survey studies in China [2] [9] [11] [13] .

Citizens of Wuhan demonstrated an impressive willingness to change their behavior. In our study, 95% of participants indicated that they would modify their behavior (e.g., reduce their private car driving) if the government required it, in order to help improve AQ, etc.), and it seems more females and participants with master education are more willing to change their behavior (Table 10). Our results also indicate that participants in the age 25 - 45 working at public and governmental organizations have already higher number air purifiers at home, or were more willing to buy an air purifier, while high school students have quite lower number of air purifiers at home or were not willing to buy an air purifier (Table 11). Other similar studies indicated that the public has a strong health protection consciousness, e.g., taking protective measures indoors during haze weather, and wearing facemasks when going outside [10] [11] . These levels of public support will hopefully be leveraged by the decision-makers to help develop stricter regulations for AQ.

The participants suggested that there should be increased governmental funding in order to improve AQ. Other suggestions made by the participants included more focus on the control and reduction of air pollution from traffic and industry, reduction in waste burning, and increased public transportation. However, local government reports show that an increase of privately owned motor vehicles is the largest contributor of current air pollution in Wuhan [27] .

Our study aimed at engaging heterogeneous population groups. However, the participants were composed mainly of students (50%), enterprises (22%) and administrative people (19%). In addition, 79% of the participants have bachelors or higher education, 91% are under 45 years, and 69% are from central city area. To explore the general public perception and knowledge level on AQ, and for awareness raising, these types of limitations shall be further mitigated by covering more people of other groups (e.g., asthma and allergy patients, highly exposed people, residents of rural areas with lower levels of education, the elderly people, etc.) in any future study.

5. Conclusions

An innovative aspect of this survey was the exploration of participants’ perceptions of AQ related issues. This was undertaken in order to develop recommendations for the provision of relevant, easy-to-understand AQ information and focused activity advice. As a result of the survey, it is clear that many people in Wuhan perceive air pollution to have a negative impact on human health. The survey responses indicated that in the public’s opinion, vehicles and waste release from industry and domestic usage cause the majority of air pollution in the city.

Around 65% of survey participants felt that AQ was poor in Wuhan, while only 2% considered it good, with no serious threat imposed on the environment or on public health. This indicates that awareness levels of AQ related issues have increased dramatically, even though China does not have awareness or implementation strategies yet. Furthermore, this lack of any official strategy may explain why 51% of participants were unaware of the real-time AQ release system published by the government. Sources like electronic media and newspapers were the major mediums used by the participants to receive updates and notifications on air pollution.

The majority believed that respiratory disease is a major health risk as a result of air pollution. The study showed that the public supports governmental initiatives to improve AQ due to their concern that poor AQ can cause respiratory illnesses. A large number of participants (95%) expressed their willingness to contribute to improving AQ in Wuhan.

However, organizing participation for improving AQ at the community level remains a major challenge in Wuhan. And even though the government makes some effort to inform the citizens, the public is unaware of developments at the policy level, and feels that no enough information has been provided. In order to mitigate this, more effort on sharing information and raising awareness is now being made.

A majority of respondents expressed that they learned a lot about AQ issues via this survey and suggested that more surveys and public participation activities be performed in Wuhan for knowledge sharing and awareness raising. Several participants also stated that it is important that the government should make strong, sustainable initiatives, to improve quality of life. For the mitigation plan, respondents provided a number of possible solutions to mitigate the AQ issue. These were: 1) A mandatory legal framework should be enacted by the government prohibiting industries to pollute, and move those polluting industries outside the city; 2) Investment in research to introduce cleaner fuels and improve existing public transport systems; 3) To promote industries that employ renewable energy sources through tax incentives; 4) To introduce hybrid/electric vehicles to reduce emission levels, and 5) To increase support for air pollution and related topics in academia.

Initiatives such as this public perception survey are an important tool in gauging citizens’ understanding of issues. However, they do much more than that. While providing data, they also help raise awareness and generate interest within the community, in this case leading to an action plan that may prove effective in air pollution mitigation.

Acknowledgements

The study presented here evolved from work undertaken in the project, Hubei-AQ.info. Hubei-AQ.info is a project supported by the EU-China Environmental Governance Programme (EGP) and the Ministry of Environmental Protection, China (MEP). Special thanks to Li Liu at NILU (Norwegian Institute for Air Research) and two anonymous reviewers from the Journal of Environmental Protection for the suggestions and comments.

Cite this paper

Liu, H.Y., Kobernus, M. and Liu, H. (2017) Public Perception Survey Study on Air Quality Issues in Wuhan, China. Journal of Environmental Protection, 8, 1194-1218. https://doi.org/10.4236/jep.2017.810075

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