Earth Day was first celebrated in 1970. Wisconsin Senator Gaylord Nelson started Earth Day as a way to bring awareness to issues impacting the environment. At this time, there was no EPA to monitor such things.
In 1990, Earth Day became a worldwide celebration. This day continues to bring awareness of environmental issues but has expanded its mission. Earth Day now also draws attention to global climate change. It is also a way to celebrate the Earth’s resources and ways to more effectively and efficiently use them.