1. Ivanhoe Reservoir, Los AngelesPhoto: Gerd Ludwig 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.

    Ivanhoe Reservoir, Los Angeles
    Photo: Gerd Ludwig

    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.

     
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    臭素酸塩に汚染されたため、日よけのためのプラスティック製ボールが浮かべられている米国カリフォルニア州のSilver Lake Reservoir
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