Every year on April 22, Earth Day marks the anniversary of the birth of the modern environmental movement in 1970. (earthday.org)
Official Earth Day Site
United States Environmental Protection Agency Earth Day Site
NYC Earth Day Events
Museum of the City of New York Earth Day learning activities
Earth Day Initiative Site
Greener Days Ahead from Union Square Partnership Site
Earth Day Action Toolkit
Earth Day Teaching Resources from Edutopia
Earth Day Vision from Communities for Recycling