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Turning crop waste to fertilizer could fight air pollution in India

Towards the end of the year, the season changes in northern India. Cold weather begins to set in and the air gets thick with smoke. After their winter harvest, millions of farmers clear the leftover rice stubble by setting entire fields alight to prepare for the incoming wheat crop.

source https://www.cnn.com/2021/11/09/india/vidyut-mohan-india-air-pollution-earthshot-prize-c2e-spc-intl/index.html