Buildings are seen shrouded in smog from the 102nd floor of Seoul's Lotte World Tower in December 2015. Bloomberg via Getty Images hide caption

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Bloomberg via Getty Images

Korea's Air Is Dirty, But It's Not All Close-Neighbor China's Fault

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After the pigeons are fitted with pollution sensors, they are released into different parts of London. Londoners can then get live air quality readings via Twitter. Rich Preston/NPR hide caption

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Rich Preston/NPR

Pigeons Are London's Newest Pollution Fighters

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The Speck air quality monitor costs $200, but is available to all through Pittsburgh's public library system. Carnegie Mellon University CREATE Lab hide caption

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Carnegie Mellon University CREATE Lab

A Home Air Quality Monitor That Can Be Checked Out From The Library

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Cooking on gas and electric stoves can create indoor air pollution. The best way to avoid it is to buy a good range hood that vents outside, experts say. iStockphoto.com hide caption

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iStockphoto.com

Fixing Stove Hoods To Keep Pollution Out Of The Kitchen

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