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To go with AFP story Climate-warming-UN-COP21-China-environment-economy-law, FOCUS by Benjamin Dooley In this photo taken on December 11, 2015, Yann Boquillod displays an Airvisual air quality monitor in Beijing. Airvisual is a China-based social enterprise developing technology for a global pollution monitoring network . AFP PHOTO / Greg BAKER / AFP / GREG BAKER (Photo credit should read GREG BAKER/AFP/Getty Images)

To go with AFP story Climate-warming-UN-COP21-China-environment-economy-law, FOCUS by Benjamin Dooley In this photo taken on December 11, 2015, Yann Boquillod displays an Airvisual air quality monitor in Beijing. Airvisual is a China-based social enterprise developing technology for a global pollution monitoring network . AFP PHOTO / Greg BAKER / AFP / GREG BAKER (Photo credit should read GREG BAKER/AFP/Getty Images)
Getty Images

AFP GREG BAKER