A surfer practices in Morro Bay, California September 20, 2006. Surfers have suspected that their illness is due to the red-tide phenomenon, an algae bloom that some people claim produces toxins that cause respiratory illness in humans. Coastal water pollution and increases in seawater temperatures appear to be causal factors in red tides. Agriculture isn't required to treat its run-off, which can contain everything from pesticides to fertilizers to animal waste. Air pollution is responsible for almost one-third of the toxic contaminants and nutrients that enter coastal areas and oceans. Studies say that every eight months, nearly 11 million gallons of oil run off our streets and driveways into our waters that's the equivalent of the Exxon Valdez oil spill. In California alone, 1.5 billion gallons of sewage containing 120 tons of mass solids (sewage sludge) are discharged into the Pacific Ocean every single day. CORBIS/Phil Klein..