What caused the Asian Brown Cloud?
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Regarding this, what are the pollution sources that create the Asian Brown Cloud?
The Asian brown cloud is created by a range of airborne particles and pollutants from combustion (e.g., woodfires, cars, and factories), biomass burning and industrial processes with incomplete burning.
Furthermore, what is the international community doing about the Asian Brown Cloud? A three-kilometre-thick “brown cloud” of man-made pollution, which stretches from the Arabian Peninsula to China to the western Pacific Ocean, is making Asian cities darker, speeding up the melting of Himalayan glaciers and impacting human health, according to a new United Nations Environment Programme (UNEP) report.
Similarly, you may ask, why are the clouds Brown?
Atmospheric brown clouds are caused by emissions associated with the combustion of fossil fuels and biomass. The brown colour of the clouds results from the absorption and scattering of solar radiation by black carbon, fly ash, soil dust particles, and nitrogen dioxide.
Why is polluted air reddish brown?
Nitrogen Oxides as Pollutants Nitrogen oxides are at least partially responsible for several types of air pollution. Nitrogen dioxide lends its color to the reddish-brown haze we call smog. Nitrogen dioxide in the air also reacts with water vapor to form nitric acid, one of the types of acid in acid rain.