KPIX CBS 5 Eyewitness News At 5PM August 12, 2010
clean water act because of chronic trash problems and three in san mateo county. they can affect the water supply, bay water quality and harm wildlife with contaminants. >> what surprises me the most is when a tree comes down and so much trash builds up behind it. >> reporter: the santa clara valley water district has ongoing creek clean-up projects both for water quality and flood control. but it's a never-ending battle. >> with our inherent behaviors that people do with dumping or throwing things on the ground, we often have a hard time staying ahead of it. so until people change t...
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