Some good history included.
http://dundalk.patch.com/articles/the-first-earth-day-recalling-wisconsin-senator-and-founder-gaylord-nelsonThe First Earth Day: Recalling Wisconsin Senator and Founder Gaylord Nelson
Earth Day rallies helped lead to passage of the Clean Air, Clean Water and Endangered Species Acts.
By Ron Cassie | Email the author | 2:16am
Founded in 1970 as an environmental teach-in by a U.S. Senator from Wisconsin after the 1969 Santa Barbara oil spill, Earth Day rallies helped lead to passage of the Clean Air, Clean Water and Endangered Species Act. Courtesy image
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In 1969, two environmental crises—a massive oil tanker spill off the coast of Santa Barbara, and an oil, grease and garbage fire on the infamous Cuyahoga River, which shot flames into the air over Cleveland—became iconic images of ecological destruction.
Other images, of urban smog, of a dead Lake Erie, of the pesticide DDT killing backyard birds, stuck in the public’s mind, as well as with a Wisconsin U.S. senator named Gaylord Nelson. The principal founder of Earth Day, Nelson launched the first Earth Day on April 22, 1970, attracting 20 million Americans to demonstrations, rallies, lectures and marches across the country.
By 1990, Earth Day had become a global phenomenon, mobilizing 200 million people in 140 countries.
In Beyond Earth Day, published in 2002, Nelson says he got the idea for Earth Day while on a conservation tour out west in the summer of 1969, when peace “teach-ins” against the Vietnam War were gaining popularity........................