96 million plastic balls prevent drought, water pollution

Black plastic balls have been dumped by the millions into L.A.’s reservoirs this summer—and with good reason. Known as shade balls, they play an essential role in protecting the city’s water supply, which has been severely threatened by this year’s brutal California drought. Among some of their benefits, the Los Angeles Daily News says they prevent the reservoir’s water from evaporation and pollution by wildlife. The balls even stop toxic chemical reactions caused by the sun from contaminating the water.

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Source: time.com

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