Earth Day is a global event for environmental awareness. US Senator Gaylord Nelson started it in 1970. Millions participate in events across 190 countries. The day led to the EPA and key ...

But it was a senator from Wisconsin, Democrat Gaylord Nelson, who had the idea that would become Earth Day. Nelson had long been concerned about the environment when a massive offshore oil spill ...

The first Earth Day was celebrated in 1970, when Wisconsin senator Gaylord Nelson organized a national demonstration to raise awareness about environmental issues, according to National Geographic.