Watch Northeast kindergarten teacher Bridgechell Dawson talk about her students' Earth Day project. (Video)
Earth Day occurs on April 22 of each year and marks the anniversary of the start of the modern environmental movement.
The idea for a national day to focus on the environment came to Earth Day founder Gaylord Nelson, then a U.S. Senator from Wisconsin, after witnessing the ravages of the 1969 massive oil spill in Santa Barbara, California.