(April 22, 1970), an activity aimed at mobilizing the public to pay attention to environmental issues; Suggested by Senator Gaylord Nelson of Wisconsin, hoping to hold it once a year; When lawmakers spoke at rallies across the United States, Congress adjourned and as many as 25,000 people attended the rally. 1980, about 250,000 people marched in new york to commemorate the first Earth Day; 1990 the theme of the celebration is the individual responsibility to stop pollution and develop the limited resources of the earth; 1200 million people from 40 countries took part in parades, garbage removal and concerts.