Earth Day comes around every year on April 22 but the history and idea behind the day is not commonly discussed. The concept for Earth Day was for the nation to focus on the environment for one day. Founder Gaylord Nelson was a U.S. Senator from Wisconsin. After seeing the 1969 massive oil spill in Santa Barbara and being ruled by the student anti-war movement, he related the public needed to be aware of the air and water pollution they were contributing. Nelson worked until the next year Earth Day Network states that "on April 22, 1970, 20 million Americans took to the streets, parks, and auditoriums to demonstrate for a healthy, sustainable environment in massive coast-to-coast rallies." Learn more about Earth Day.