File - In this Friday, Sept. 6, 2019 file photo, commuters make their way along an expressway during rush hour in Beijing. According to Chinese state media, the average concentration of PM2.5 fine air pollutants in Beijing in August was at the lowest level ever recorded for that month. Inger Andersen, head of the U.N. Environment Program, says the world needs 'quick wins to reduce emissions as much as possible in 2020.' Ahead of a global climate summit in Madrid next week, her agency published a report Tuesday showing the amount of planet-heating gases released into the atmosphere hitting a new high last year. (AP Photo/Mark Schiefelbein, file)
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