What is Earth Day?
"An annual observance of the need to protect the natural environment, held on April 22. Conceived by Senator Gaylord Nelson of Wisconsin, the first Earth Day was held in 1970, organized by environmentalist Dennis Hayes... The concept caught the imagination of many Americans, especially students, and some 20 million people participated in Earth Day demonstrations that first year, including 10,000 grade and high schools, 2,000 colleges, and 1,000 communities. Congress adjourned for the day so that members could speak at environmental rallies in their districts...Although many thought Earth Day would die out, it obviously did not, and is now observed in 140 countries. Some churches and synagogues also celebrate the occasion with an "Earth Day Sabbath" on the Saturday or Sunday nearest to April 22."
Text from: Ashworth, William, and Charles E. Little. "Earth Day." Science Online. Facts On File, Inc. Web. 17 Apr. 2012.
Image: Yukihisa Isobe, for the Environmental Action Coalition. "Earth Day--April 22." In Virga, Vincent, and Curators of the Library of Congress, with commentary by Alan Brinkley (2004). Eyes of the Nation: A Visual History of the United States. Charlestown, MA: Bunker Hill Publishing. ArtStor. Web. 17 Apr. 2012.