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Global Technology for Local Monitoring of Air Pollution in Dhaka

World Bank 2020.10.16
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The World Health Organization attributes about 3.3 million annual premature deaths to outdoor air pollution in low- and middle-income countries. Comprehensive pollution monitoring in urban areas has been too costly for many developing countries; yet sparse information has hindered cost-effective pollution management strategies.Global information technologies offer a potential escape from this information trap, but their accuracy remains uncertain. This paper uses ground-based measures of fine particulates and nitrogen dioxide, provided by the CAMS-3 Darussalam monitoring station in Dhaka, Bangladesh, to test three global technologies: the European Space Agency’s Sentinel-5P, the National Aeronautics and Space Administration’s Moderate Resolution Imaging Spectroradiometer, and Google Traffic. The results indicate that all three global technologies can provide useful information for extension of air pollution measurement beyond the few areas that are currently monitored by ground stations. Each technology tracks ground-based fine particulates measures with high significance, and the European Space Agency’s Sentinel-5P and Google Traffic perform similarly for ground-based nitrogen dioxide measures. Google Traffic can provide accurate tracking at higher spatial and temporal resolution than the satellite sources, but only for emissions from motor vehicles in major metro areas. The Moderate Resolution Imaging Spectroradiometer and the European Space Agency’s Sentinel-5P capture the effects of emissions from other sources at all locations.

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