Indoor air pollution can contribute between 22 and 52% to the overall pollution levels, according to a United Nations Environmental Programme study. It also said that emissions from household cooking and heating will need to be reduced to greatly improve air quality.
from Hindustan Times - lifestyle https://www.hindustantimes.com/fitness/indoor-pollution-in-india-contributes-up-to-52-air-pollution-says-un/story-A08dySO5fQNWeeTTtz6qeO.html>
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