Ever wondered why we have Earth Day? Learn why the United States commemorates the Earth with a special day.

It all started with a pivotal event in 1969.
On January 28, 1969, an oil spill off the coast of Santa Barbara dumped approximately three million gallons of oil into the Pacific Ocean. The spill spread over 35 miles, thousands of birds died, and the beaches were covered in oil.

Local citizens organized within days to advocate for an end to oil drilling in the Santa Barbara Channel. Newly elected President Nixon, who had a home overlooking the affected area, visited, as did Gaylord Nelson, a Wisconsin senator with a growing interest in environmental issues. All saw the disaster first hand.
Nelson had a bright idea.
Thinking about what he had witnessed, Nelson thought about the Vietnam teach-ins to protest the war: "It suddenly dawned on me,” he later recalled, 'why not a nationwide teach-in on the environment?' The idea of Earth Day took root.” (Smithsonian Magazine, April 22, 2019)
Nelson founded the non-profit Environmental Teach-In, Inc. and found a co-chair in Pete McCloskey who represented San Mateo County, California, in the U.S. House of Representatives. Denis Hayes, a 25-year old graduate student, was recruited to help organize the first Earth Day event, April 22, 1970, across the U.S. (and in future years, worldwide).

A rally in New York. NewYork Public Library, April 20, 2017.
According to Earth Day’s website, approximately 20 million Americans participated in the first Earth day, or put another way, 10% of the total U.S. population!
Other key events that happened in 1970: The Environmental Protection Agency was established and the National Environmental Education Act, Occupational Safety and Health Act, and the Clean Air Act were passed. The Clean Water Act was passed in 1972.
Earth Day 2025
As we mark the 55th Earth Day, it is more important than ever that we look at how we can be good stewards of the environment in our community, the region, and beyond.
Join Greener Grove as we celebrate Earth Day and all that is happening right here, right now to make Downers Grove a more sustainable community.
Find out more about Greener Grove's Earth Week Events here!