Air-conditioning has become both our answer to a warming planet and a major obstacle to actually confronting it.Emily Badger, who covers cities and urban policy for The Times, explains the increasingly dangerous paradox of trying to control the temperature.Guest: Emily Badger, who covers cities and urban policy for The New York Times.Background reading: 

• From 2017: How air-conditioning conquered America.
• Air-conditioning use will surge in a warming world, the U.N. has warned.

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