What are the tradeoffs when people have to choose between clean air and clean water?

People in many parts of the world lack access to clean water, but boiling water to make it safer often requires burning wood or other dirty fuels that expose them to air pollution. How do these two risks compare to each other? A new study suggests that, while health risks from the resulting air pollution are real, the benefits associated with boiling water generally outweigh those risks.

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