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Faced With Heavier Rains, Cities Scramble to Control Polluted Runoff
https://e360.yale.edu/features/cities-flooding-combined-sewer-overflows-climate-change
To manage contaminated stormwater, Philadelphia went all in on “green” infrastructure, like rain gardens and permeable pavement. But an increase in extreme rain events is spurring other U.S. cities to double down on traditional sewer upgrades that can handle the overflow.