In California, Millions of ‘Shade Balls’ Combat a Nagging Drought - The New York Times
▻http://www.nytimes.com/2015/08/13/us/in-california-millions-of-shade-balls-combat-a-nagging-drought.html
Facing a long-term water crisis, officials concerned with preserving a reservoir in Los Angeles hatched a plan: They would combat four years of drought with 96 million plastic balls.
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