Photo of the Day

Plastic balls in the Ivanhoe Reservoir
October 8, 2011

Ivanhoe Reservoir, Los Angeles

This Month in Photo of the Day: Photos From New National Geographic Books In 2007, high levels of bromate—a carcinogen formed when bromide and chlorine react with sunlight—were found in Los Angeles’s Ivanhoe Reservoir. Today three million black plastic balls help deflect UV rays. (From the upcoming National Geographic book Visions of Earth) Pre-order the book Visions of Earth » See more pictures in our monthly Visions of Earth feature » See more freshwater pictures »
Photograph by Gerd Ludwig, National Geographic

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