Is the world getting better or worse?

Unchallenged
Nov 29, 20

Air pollution in places like New Delhi and Beijing represent one of the largest public health crises of the 21st century.

In places like this, people still rely on burning wood, cow dung, sugar cane and other solid fuels. During one extreme pollution event in New Delhi in late 2016, the levels were more than 25 times the U.S. Environmental Protection Agency’s (EPA) standard.

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