HD Earth Day Wallpapers

By the early 1960s Americans were becoming aware of the effects of pollution on the environment.

Protecting the planet’s natural resources was not part of the national political agenda, and the number of activists devoted to large-scale issues such as industrial pollution was minimal.

Factories pumped pollutants into the air, lakes and rivers with few legal consequences.

Big, gas-guzzling cars were considered a sign of prosperity.