On April 22, 1970, 20 million people across America  celebrated the first Earth Day. It was a time when cities were buried under  their own smog and polluted rivers caught fire. Now Earth Day is celebrated  annually around the globe. Through the combined efforts of the U.S. government,  grassroots organizations, and citizens like you, what started as a day of  national environmental recognition has evolved into a world-wide campaign to  protect our global environment. Learn more about Earth Day at http://www.epa.gov/earthday.  
 VIA- www.eponline.com