Free Earth Day Wallpapers

Environmental groups have sought to make Earth Day into a day of action to change human behavior and provoke policy changes.

This group agreed to head up the New York City activities within the national movement.

The crowd was estimated as more than one million — by far the largest in the nation.

During the 1970 Earth Day, given assumptions of continued exponential annual population growth of 2% or more and unchanged or increasing climate impact per person.