After the first Earth Day (if I remember correctly) in NYC Central Park (1970?) the "Leftie-Hippie-Yuppie-Greenie" participants left several tons of trash on the grounds, for others to pick up.
(The web seems to have been well-cleansed of this FACTS)
An Truely-Left-American beginning for a holiday to celebrate the Preservation of our Earth.
Even in the "dark ages" of 1970's, America was being fooled by Eco-Fools who ride around in gas guzzling cars but tell everyone they are conservationists. Simple outright fraud?