Science Of...

LA's "Shade Balls" Have Actually Worked

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When Los Angeles needed to cover its open-air reservoirs, instead of spending several hundred million dollars on a solid cover, officials did something a little odd: they dumped 95 million floating balls into the water, hoping that they'd adequately protect the water from pollution and evaporation. A year later, the plan seems to have worked. Hear all about the scheme and its successes in the videos below.

LA's Shade Balls Actually Worked

Who knew dumping millions of black balls would actually protect the water?

Why Did California Turn To Shade Balls To Battle Drought?

Hear why they work to protect LA's reservoir.

Anatomy Of A Shade Ball

Find out what they're made of and why they're designed the way they are.