Senator Gaylord Nelson of Wisconsin established Earth Day in 1970 as a teaching opportunity for budding environmentalists and as a way to increase ecological awareness and grassroots activity. From those humble beginnings, Earth Day is grown into a national celebration of environmentalism and conservation with events in nearly 200 countries. The largest such event is the EarthX Expo–an annual 3-day weekend celebration held around Earth Day in Dallas, Texas.
Visit the Energy Saver Blog to learn where to find the U.S. Department of Energy at the EarthX Expo, and how you can observe Earth Day and "Invest in Our Planet" (this year's Earth Day theme):
