By FREDERIC J. FROMMER 2010-07-29T14:36:50Z WASHINGTON (AP) -- In 1969, Sen. Gaylord Nelson was so moved after seeing the devastation of an oil spill off the California coast near Santa Barbara that he called for a national teach-in on the environment. The resulting "Earth Day" the following year kick-started the modern environmental movement and shaped the way Americans thought about their air, water and soil....