Tangentially, here's a neat WHO's map of global air pollution I find useful when traveling abroad: http://maps.who.int/airpollution/
Edit: made headlines https://www.theguardian.com/cities/2019/jul/17/a-city-suffoc...
>In the first major attempt to estimate the health and economic costs of air pollution in Africa, an Organisation for Economic Co-operation and Development report[0] found that air pollution in Africa already causes more premature deaths than unsafe water or childhood malnutrition.
>Given the lack of PM2.5 ground measurements in Africa, the PM2.5 data derived from the WHO air quality model for Africa should be viewed with caution.
>The review [1] concluded that (based on the few studies) 17%, 10%, 34%, 17% and 22% of PM2.5 levels in Africa are due to traffic, industry, domestic fuel burning, unspecified source of human origin and natural sources - such as dust and sea salt.
[0] https://www.oecd-ilibrary.org/development/the-cost-of-air-po... https://www.oecd-ilibrary.org/the-cost-of-air-pollution-in-a...
[1] https://source-apportionment.jrc.ec.europa.eu/Docu/Karagulia...