Gaylord Nelson, the late U.S. senator and governor of Wisconsin, is considered the founder of Earth Day, which started in 1970.

On April 22, 1970, Philadelphia hosted a six-hour festival in Fairmount Park that drew 25,000 to 30,000 clean-air lovers. The bow-tied W. Thacher Longstreth agreed to meet a few young people who ...

Climate conditions affecting the planet continue to develop since the first Earth Day was celebrated in 1970. CBS News' David Schechter breaks down the newest challenges the Earth is facing.

It's been more than 50 years since the first Earth Day in the United States. On April 22, 1970, people gathered at events across the country to raise awareness about the environmental issues ...

Earth Day is celebrated on April 22 each year, promoting environmental protection and awareness since 1970.

The holiday remains one of the largest secular observances in the world, used to spotlight ongoing threats including plastic ...