Celebrate Earth Day!
Earth Day is an annual observance, held on April 22, to increase public awareness of environmental issues. Each year on Earth Day, millions of people throughout the world gather to clean up litter, to protest threats to the environment, and to celebrate progress in reducing pollution.¹
¹Hayes, Denis. "Earth Day." World Book Online Reference Center. World Book, 2012. Web. 13 Apr. 2012.