3 ms·LA Uses 400,000 Plastic Balls To Protect Water Resevoir (2008)2 points by personjerry 13y agopersonjerry 13y agoImages available at http://whenonearth.net/400000-balls-in-the-ivanhoe-reservoir-in-la/ http://whenonearth.net/400000-balls-in-the-ivanhoe-reservoir...