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The state of ambient air quality in Pakistan—a review

  • AREA 3.3 • LOCAL TO REGIONAL PHENOMENA AS TO AIR POLLUTION AND ITS IMPACTS • REVIEW ARTICLE
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Abstract

Background and purpose

Pakistan, during the last decade, has seen an extensive escalation in population growth, urbanization, and industrialization, together with a great increase in motorization and energy use. As a result, a substantial rise has taken place in the types and number of emission sources of various air pollutants. However, due to the lack of air quality management capabilities, the country is suffering from deterioration of air quality. Evidence from various governmental organizations and international bodies has indicated that air pollution is a significant risk to the environment, quality of life, and health of the population. The Government has taken positive steps toward air quality management in the form of the Pakistan Clean Air Program and has recently established a small number of continuous monitoring stations. However, ambient air quality standards have not yet been established. This paper reviews the data being available on the criteria air pollutants: particulate matter (PM), sulfur dioxide, ozone, carbon monoxide, nitrogen dioxide, and lead.

Methods

Air pollution studies in Pakistan published in both scientific journals and by the Government have been reviewed and the reported concentrations of PM, SO2, O3, CO, NO2, and Pb collated. A comparison of the levels of these air pollutants with the World Health Organization air quality guidelines was carried out.

Results

Particulate matter was the most serious air pollutant in the country. NO2 has emerged as the second high-risk pollutant. The reported levels of PM, SO2, CO, NO2, and Pb were many times higher than the World Health Organization air quality guidelines. Only O3 concentrations were below the guidelines.

Conclusions

The current state of air quality calls for immediate action to tackle the poor air quality. The establishment of ambient air quality standards, an extension of the continuous monitoring sites, and the development of emission control strategies are essential.

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References

  • ADB&CAI-Asia (2006a) Country Synthesis Report On Urban Air Quality Management Indonesia.2006 Asian Development Bank and the Clean Air Initiative for Asian Cities (CAI-Asia) http://www.cleanairnet.org/caiasia/1412/csr/indonesia.pdf

  • ADB&CAI-Asia (2006b) Country Synthesis Report On Urban Air Quality Management Philippines.2006 Asian Development Bank and the Clean Air Initiative for Asian Cities (CAI-Asia) http://www.cleanairnet.org/caiasia/1412/csr/philippines.pdf

  • Ali M, Athar M (2008) Air pollution due to traffic, air quality monitoring along three section of National Highway N-5, Pakistan. Environ Monit Asses 136:219–226

    Article  CAS  Google Scholar 

  • Aziz JA (2006) Towards establishing air quality guidelines for Pakistan. East Mediter Health J 12:886–893

    CAS  Google Scholar 

  • Aziz A, Bajwa IU (2004) Energy and pollution control opportunities for Lahore. Urban Transport X 16:751–760

    Google Scholar 

  • Aziz A, Bajwa IU (2007) Minimizing human health effects of urban air pollution through quantification and control of motor vehicular carbon monoxide (CO) in Lahore. Environ Monit Assess 135:1–3

    Article  CAS  Google Scholar 

  • Aziz A, Bajwa IU (2008) Erroneous mass transit system and its tended relationship with motor vehicular air pollution (an integrated approach for reduction of urban air pollution in Lahore). Environ Monit Assess 137:25–33

    Article  Google Scholar 

  • Barletta B, Meinardi S, Simpson IJ et al (2002) Mixing ratios of volatile organic compounds (VOCs) in the atmosphere of Karachi, Pakistan. Atmos Environ 36:3429–3443

    Article  CAS  Google Scholar 

  • Beg MAA (1990) Report on status of air pollution in Karachi, past, present and future. Pakistan Council of Scientific and Industrial Research, Karachi

    Google Scholar 

  • Begum BA, Biswas SK, Hopke PK (2006) Temporal variations and spatial distribution of ambient PM2.5 and PM10 concentrations in Dhaka, Bangladesh. Sci Total Environ 358:36–45

    Article  CAS  Google Scholar 

  • BJEPB (2005) cited in Schwela D, Haq G, Huizenga C et al. (2006) Urban air pollution in Asian cities, Earthscan 8–10 Camden high street, London, pp177

  • BOE (2005) Bureau of Environment Tokyo (2005) cited in Schwela D, Haq G, Huizenga C et al. (2006) Urban air pollution in Asian cities, Earthscan 8–10 Camden High Street, London, pp 193

  • CAI-Asia (2006) Country Synthesis Reports on Urban Air Quality Management in Asia. http://www.cleanairnet.org/caiasia/1412/article-70822.html

  • Cassidy BE, Alabanza-Akers MA, Akers TA et al (2007) Particulate matter and carbon monoxide multiple regression models using environmental characteristics in a high diesel-use area of Baguio City, Philippines. Sci Total Environ 381:47–58

    Article  CAS  Google Scholar 

  • Chan CK, Yao X (2008) Air pollution in mega cities in China. Atmos Environ 42:1–42

    Article  CAS  Google Scholar 

  • Clean Air Sirilanka Net (2006). cited in Schwela D, Haq G, Huizenga C et al. (2006) Urban air pollution in Asian cities, Earthscan 8–10 Camden High Street, London, pp179

  • CPCD (2006) Central pollution control board, Ministry of environment& forests, Goverenment of India, Paarivesh Bhawan, East Arjun Nagar, Delhi. http://www.cpcb.nic.in/Annual%20Report/Previous%20Year/AnnualReport_2005–2006.pdf

  • Dutkiewicz VA, Alvi S, Ghauri BM, Choudhary MI, Husain L (2009) Black carbon aerosols in urban air in South Asia. Atmos Environ 43:1737–1744

    Article  CAS  Google Scholar 

  • EPA (2007) Environmental Protection Administration, R.O.C. (Taiwan). Taiwan. Environmental statistics, Concentration of major air pollutants. http://www.epa.gov.tw/en/statistics/c1020.pdf Accessed on March 2007

  • EPD (2004) Environmental Protection Department . Air quality in Hong Kong. http://www.epd-asg.gov.hk/english/report/aqr.php

  • Farhana B, Husain L (2006) Trace Element Chemistry in Urban Atmospheric Aerosols. American Geophysical Union, Fall Meeting 2006, Abstract #A11A–0835

  • Fu J (2004) cited in Schwela D, Haq G, Huizenga C et al. (2006) Urban air pollution in Asian cities, Earthscan 8–10 Camden High Street , London, pp 190

  • Ghauri BMK, Salam M, Mirza MI (1988) A report on assessment of air pollution in metropolitan Karachi. Space Science Division (SPARCENT), Pakistan Space and Upper Atmosphere Research Commission (SUPARCO), Karachi

  • Ghauri B, Salam M, Mirza MI (1992a) Air-quality in the Karachi metropolitan-area. Global Environ Change-Hum Policy Dimens 2:157–159

    Google Scholar 

  • Ghauri BMK, Salam M, Mirza MI (1992b) Surface ozone in Karachi. In: Ilyas M (ed) Ozone depletion: implication for the tropics. University of Science Malaysia, Penang, pp 167–177

    Google Scholar 

  • Ghauri B, Salam M, Mirza MI (1994) An assessment of air-quality in Karachi, Pakistan. Environ Monit Assess 32:37–45

    Article  CAS  Google Scholar 

  • Ghauri BM, Mirza MI, Richter R et al (2001) Composition of aerosols and cloud water at a remote mountain site (2.8 kms) in Pakistan. Chemosphere, Glob Chang Sci 3:51–63

    Article  CAS  Google Scholar 

  • Ghauri B, Lodhi A, Mansha M (2007) Development of baseline (air quality) data in Pakistan. Environ Monit Assess 127:237–252

    Article  CAS  Google Scholar 

  • Government of Pakistan (2006–2007) Pakistan Economic Survey Report. Ministry of Finance, Islamabad

    Google Scholar 

  • Gurjar BR, Butler TM, Lawrence MG et al (2008) Evaluation of emissions and air quality in megacities. Atmos Environ 42:1593–1606

    Article  CAS  Google Scholar 

  • Hameed S, Mirza MI, Ghauri BM et al (2000) On the widespread winter fog in Northeastern Pakistan and India. Geophys Res Lett 27:1891–1894

    Article  CAS  Google Scholar 

  • Harrison RM, Smith DJT, Pio CA et al (1997) Comparative receptor modelling study of airborne particulate pollutants in Birmingham (United Kingdom), Coimbra (Portugal) and Lahore (Pakistan). Atmos Environ 31:3309–3321

    Article  CAS  Google Scholar 

  • Hashmi DR, Khani MI (2003) Measurement of traditional air pollutants in industrial areas of Karachi, Pakistan. J Chem Soc of Pak 25:103–109

    CAS  Google Scholar 

  • Hashmi DR, Shaikh GH, Usmani TH (2005a) Ambient air quality at Port Qasim in Karachi city. J Chem Soc of Pak 27:575–579

    CAS  Google Scholar 

  • Hashmi DR, Shaikh GH, Usmani TH (2005b) Air quality in the atmosphere of Karachi city—an overview. J Chem Soc of Pak 27:6–13

    CAS  Google Scholar 

  • Hopke PK, Cohen DD, Begum BA et al (2008) Urban air quality in the Asian region. Science of the Total Environment 404:103–112

    Article  CAS  Google Scholar 

  • Husain L, Dutkiewicz VA, Khan AJ et al (2007a) Characterization of carbonaceous aerosols in urban air. Atmos Environ 41:6872–6883

    Article  CAS  Google Scholar 

  • Husain L, Farhana, BK, Ghauri BM (2007b) Emission Sources and Chemical Composition of the Atmosphere of a Mega-city in South Asia. Eos Trans. AGU 88 (23), Joint Assembly Suppl., A31C–01

    Google Scholar 

  • Hyder AA, Ghaffar AA, Sugerman DE et al (2006) Health and road transport in Pakistan. Public Health 120:132–141

    Article  CAS  Google Scholar 

  • Ikram MJ, Akram AA (2007) Air pollution monitoring through an Internet-based network of volunteers. Environ Urban 19:225–241

    Article  Google Scholar 

  • Ilyas SZ (2006) Air pollution studies and determination of smoke particles size on Siryad Road, Quetta, Pakistan. World App Sci J 1:122–126

    Google Scholar 

  • Jafary ZA, Faridi IA (2007) Air pollution by roadside dust and automobile exhaust at busy road crossings of Lahore. Pak J Physiol 2:31–34

    Google Scholar 

  • Jain S, Khare M (2008) Urban air quality in mega cities: a case study of Delhi City using vulnerability analysis. Environ Monit Assess 136:257–265

    Article  CAS  Google Scholar 

  • Kadir MM, Janjua NZ, Kristensen S, Fatmi Z, Sathiakumar N (2008) Status of children’s blood lead levels in Pakistan: implications for research and policy. Public Health 122:708–715

    Article  Google Scholar 

  • Khaliquzzaman M (2005) Air Quality Issues in Hanoi.Paper presented at the Meeting on AQM for Hanoi Urban Transport Project, 26 January 2005, Vietnam, http://siteresources.worldbank.org/INTVIETNAM/Resources/MKZAirQualityIssuesHanoi4.pdf

  • MOE (2005) Ministry of Environment Indonesia. Cited in Schwela D, Haq G, Huizenga C et al. (2006) Urban air pollution in Asian cities, Earthscan 8–10 Camden High Street, London, pp 184

  • MOE (2006) Environmental Statistics Yearbook, Ministry of Environment, Seoul, Republic of Korea. Cited in Schwela D, Haq G, Huizenga C et al. (2006) Urban air pollution in Asian cities, Earthscan 8–10 Camden high street, London, pp 75

  • MOE&WR (2006) Ministry of Environment and Water Resources (2006) Key environmental statistics Singapore http://www.mewr.gov.sg/soe/kes2006.pdf

  • MOEST (2005) Ministry of Environment, Science and Technology. Ambient Air Quality of Kathmandu Valley 2005 Singh Darbar, Kathmandu Nepal

  • Oanh NTK, Zhang BN (2004/06) Photochemical smog modeling for assessment of potential impacts of different management strategies on air quality of the Bangkok Metropolitan Region, Thailand. J Air Waste Manag Assoc 54:1321–1338

    CAS  Google Scholar 

  • Oanh NTK, Upadhyay N, Zhuang YH et al (2006) Particulate air pollution in six Asian cities: spatial and temporal distributions, and associated sources. Atmos Environ 40:3367–3380

    Article  CAS  Google Scholar 

  • Omar N, Bin Abas MR, Rahman NA et al (2007) Levels and distributions of organic source tracers in air and roadside dust particles of Kuala Lumpur, Malaysia. Environ Geo 52:1485–1500

    Article  CAS  Google Scholar 

  • Pak- EPA (2007) Ambient Air And Water Quality Investigation In Quetta. Available at. http://www.environment.gov.pk/PUB-PDF/Ambient%20AW%20Quetta.pdf

  • Pak-EPA (2005) State of the Environment Report, Ministry of Environment, Government of Pakistan

  • Pak-EPA (2006) The Health Effects of Air Pollution on School Children in Murree. Available at. http://www.environment.gov.pk/PUB-PDF/Preliminary%20Report.pdf. Accessed on 3 July 2008

  • Pak-EPA/JICA (2001a) 3 Cities Investigation of Air and Water Quality (Lahore, Rawalpindi & Islamabad), JICA-Pak-EPA, June 2001 Available at. http://www.environment.gov.pk/pub-pdf/3city-inv.pdf. accessed on 3 July 3, 2008

  • Pak-EPA/JICA (2001b) 2 Cities Investigation of Air and Water Quality (Gujranwala, Faisalabad), JICA-Pak-EPA, November 2003. Available at. http://www.environment.gov.pk/pub-pdf/FbadGujwla-std.pdf, accessed on 3 July, 2008

  • Pak-EPA/JICA (2006). Measurement of NO2 Concentration in Ambient Air in Major Cities of Pakistan Using Diffusion Samplers. Available at; .http://www.environment.gov.pk/news.htm#Measurement%20Of%20No2%20Concentration%20In%20Ambient%20Air%20In%20Islamabad%20Using%20Diffusion%20Samplers: Accessed on 3 July 2008

  • Pakistan Millenium Development Goals Report (2005) Government of Pakistan Planning Commission. Islamabad, Pakistan

    Google Scholar 

  • Pakistan Statistical Year Book (2007) Federal bureau of statistics. Government of Pakistan, Ministry of Economic Affairs and Statistics, Islamabad

    Google Scholar 

  • Pandey SK, Kim KH, Chung SY et al (2008) Long-term study of NOx behavior at urban roadside and background locations in Seoul, Korea. Atmos Environ 42:607–622

    Article  CAS  Google Scholar 

  • Parekh PP, Ghauri B, Siddiqi ZR et al (1987) The use of chemical and statistical methods to identify sources of selected elements in ambient air aerosols in Karachi, Pakistan. Atmos Environ 21:1267–1274

    CAS  Google Scholar 

  • Parekh PP, Ghauri B, Husain L (1989) Identification of pollution sources of anomalously enriched elements, Pakistan. Atmos Environ 23:1435–1442

    Article  CAS  Google Scholar 

  • Parekh PP, Khwaja HA, Khan AR et al (2001) Ambient air quality of two metropolitan cities of Pakistan and its health implications. Atmos Environ 35:5971–5978

    Article  CAS  Google Scholar 

  • Parekh PP, Khwaja HA, Khan AR et al (2002) Lead content of petrol and diesel and its assessment in an urban environment. Environ Monit Assess 74:255–262

    Article  CAS  Google Scholar 

  • Paul R, White F, Luby S (2003) Trends in lead content of petrol in Pakistan. Bull World Health Organ 81:468

    Google Scholar 

  • PCD (2005) Pollution Control Department Bangkok Thailand. In: Schwela D, Haq G, Huizenga C et al. (2006) Urban air pollution in Asian cities, Earthscan 8–10 Camden high street, London, pp177

  • Qadir NZ (2002) Air Quality Management in Pakistani Cities: Trends and Challenges Better Air Quality in Asian and Pacific Rim Cities (BAQ 2002) 16 Dec 2002–18 Dec 2002, Hong Kong Convention and Exhibition Centre (HKCEC)

  • Qadir MA, Zaidi JH (2006) Characteristics of the aerosol particulates in the atmosphere in an urban environment at Faisalabad, Pakistan. J Radioanal Nucl Chem 267:343–348

    Article  CAS  Google Scholar 

  • Qadir MA, Iqbal MZ, Zaidi JI (1992) Longitudinal distribution of trace elements in the atmosphere of an industrial area from neutron activation analysis. J Radioanal Nucl Chem Lett 66:465–475

    Article  Google Scholar 

  • Qadir MA, Iqbal MZ, Zaidi JI (1995) Neutron activation analysis of Ce, Yb, Se and Cr in the atmosphere of some major urban and industrial areas of Punjab, Pakistan. J Radioanal Nucl Chem Lett 201:247–354

    Article  Google Scholar 

  • Rajput MU, Ahmad S, Ahmad M et al (2005) Determination of elemental composition of atmospheric aerosol in the urban area of Islamabad, Pakistan. J Radioanal Nucl Chem 266:545–550

    Article  CAS  Google Scholar 

  • Rattigan OV, Mirza MI, Ghauri BM et al (2002) Aerosol sulfate and trace elements in urban fog. Energy Fuels 16:640–646

    Article  CAS  Google Scholar 

  • Saqib M, Jaffar M (2004) High volume sampling and dithizone scrubbing-based estimation of aerosol lead levels at Islamabad, Pakistan. J Chem Soc Pak 26:52–56

    CAS  Google Scholar 

  • Saqib M, Jaffar M, Shah MH (2007) Comparative high volume and scrubbing-based estimation of aerosol lead. J Chem Soc Pak 29:125–130

    CAS  Google Scholar 

  • SDNP (2007) The Sustainable Development Networking Programme Bangladesh. Atmospheric data.http://www.sdnpbd.org/sdi/issues/environment/data/atmosphere/continuous_air_monitoring_data_doe.pdf. accessed on March 2008

  • Shah MH, Shaheen N (2007a) Statistical analysis of atmospheric trace metals and particulate fractions in Islamabad, Pakistan. J Hazard Mater 147:759–767

    Article  CAS  Google Scholar 

  • Shah MH, Shaheen N (2007b) Annual TSP and trace metal distribution in the urban atmosphere of Islamabad in comparison with mega-cities of the world. Hum Ecol Risk Assess 13:884–899

    Article  CAS  Google Scholar 

  • Shah MH, Shaheen N (2008) Annual and seasonal variations of trace metals in atmospheric suspended particulate matter in Islamabad, Pakistan. Water Air Soil Pollut 190:13–25

    Article  CAS  Google Scholar 

  • Shah MH, Shaheen N, Jaffar M (2004a) Screening of urban aerosol particulate composites for selected metal distribution and their dependence on meteorological parameters. Annali Di Chimica 94:805–815

    Article  CAS  Google Scholar 

  • Shah MH, Shaheen N, Jaffar M (2004b) Distribution of lead in relation to size of airborne particulate matter in Islamabad, Pakistan. J Environ Manage 70:95–100

    Article  Google Scholar 

  • Shah MH, Shaheen NN, Jaffar M (2006a) Characterization, source identification and apportionment of selected metals in TSP in an urban atmosphere. Environ Monit Assess 114:573–587

    Article  CAS  Google Scholar 

  • Shah MH, Shaheen N, Jaffar M et al (2006b) Spatial variations in selected metal contents and particle size distribution in an urban and rural atmosphere of Islamabad, Pakistan. J Environ Manage 78:128–137

    Article  CAS  Google Scholar 

  • Shaheen N, Shah MH, Jaffar M (2005a) A study of airborne selected metals and particle size distribution in relation to climatic variables and their source identification. Water Air Soil Pollut 164:275–294

    Article  CAS  Google Scholar 

  • Shaheen N, Shah MH, Khalique A et al (2005b) Metal levels in airborne particulate matter in urban Islamabad, Pakistan. Bull Environ Contam Toxicol 75:739–746

    Article  CAS  Google Scholar 

  • Smith DJT, Edelhauser EC, Harrison RM (1995) Polynuclear aromatic hydrocarbon concentrations in road dust and soil samples collected in the United Kingdom and Pakistan. Environ Technol 16:45–53

    Article  CAS  Google Scholar 

  • Smith DJT, Harrison RM, Luhana L et al (1996) Concentrations of particulate airborne polycyclic aromatic hydrocarbons and metals collected in Lahore, Pakistan. Atmos Environ 30:4031–4040

    Article  CAS  Google Scholar 

  • Tahir SNA, Khan S (2008) Measurement of atmospheric dry deposition flux and resultant deposition velocity of inorganic pollutants in the provincial capital of Punjab, Pakistan. Environmental Forensics 9:290–294

    Article  CAS  Google Scholar 

  • Waheed S, Rahman A, Daud M et al (2005) Air quality evaluation of some industrial cities of Pakistan using INAA and AAS. Radiochimica Acta 93:487–495

    Article  CAS  Google Scholar 

  • Waheed S, Rahman A, Khalid N et al (2006) Assessment of air quality of two metropolitan cities in Pakistan: elemental analysis using INAA and AAS. Radiochimica Acta 94:161–166

    Article  CAS  Google Scholar 

  • Wasim M, Rahman A, Waheed S et al (2003) INAA for the characterization of airborne particulate matter from the industrial area of Islamabad city. J Radioanal Nucl Chem 25:397–402

    Article  Google Scholar 

  • WHO (1984) Urban air pollution 1973–1980. World Health Organization, Geneva

    Google Scholar 

  • WHO (2002a) The world health report 2002—reducing risks, promoting healthy life. Switzerland, Geneva

    Google Scholar 

  • WHO (2002b) Air quality guidelines for Europe; second edition. WHO European series; No. 91, Regional Office for Europe, Copenhagen

    Google Scholar 

  • WHO (2006) Air quality guidelines global update 2005. WHO Regional Office for Europe, Copenhagen

    Google Scholar 

  • WHO/UNEP (1992) Urban air pollution in megacities of the world, World Health Organization, United Nations Environment Programme. Blackwell, Oxford

    Google Scholar 

  • World Bank (2006a) PAKISTAN—Highways Rehabilitation Project. Project Information Document Report No. AB2170. 8 February 2006. Available: http://www-wds.worldbank.org/external/default/WDSContentServer/IW3P/IB/2006/02/15/000104615_20060215092856/Rendered/PDF/Updated0HRP0PID0Feb081006.pdf

  • World Bank (2006c) Pakistan Strategic Country Environmental Assessment. Vol II Technical Annex 2006. World Bank Report NO.36946-PK.October, Environmental and Social Development Unit. South Asia1818h Street, Washington DC, 20433,USA

  • World Bank (2006b) Pakistan: Strategic Country Environment Assessment. Volume I. Report No. 36946-PK. World Bank, Washington, DC

    Google Scholar 

  • World Health Organization (2007), Estimated Deaths & DALYs Attributable to Selected Environmental Risk Factors by WHO Member State in 2002, Geneva, Available at: http://www.who.int/quantifying_ehimpacts/countryprofilesebd.xls

  • World Bank Development Indicator (2006) http://devdata.worldbank.org/wdi2006/contents/Section3.htm

  • Yousufzai AH K, Hashmi DR, Khani IQ (2000) Measurements of photochemical oxidants at Sindh Industrial Trading Estate of Karachi, Pakistan. J Chem Soc Pak 22:209–216

    Google Scholar 

  • Zhang YX, Quraishi T, Schauer JJ (2008) Daily variations in sources of carbonaceous aerosol in Lahore, Pakistan during a high pollution spring episode. Aerosol Air Quality Res 8:130–146

    CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK

    Ian Colbeck & Zaheer Ahmad Nasir

  2. Department of Wildlife and Ecology, University of Veterinary and Animal Sciences, Lahore, Pakistan

    Zulfiqar Ali

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  1. Ian Colbeck
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  2. Zaheer Ahmad Nasir
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  3. Zulfiqar Ali
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Correspondence to Ian Colbeck.

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Colbeck, I., Nasir, Z.A. & Ali, Z. The state of ambient air quality in Pakistan—a review. Environ Sci Pollut Res 17, 49–63 (2010). https://doi.org/10.1007/s11356-009-0217-2

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