The First Earth Day

1970 CE

“The first Earth Day, held in 1970, marked the emergence of environmentalism into powerful political action. New public attitudes supported bitter attacks on authorities, especially in government and industry."

Earth Day, Enact, 1970, University of Michigan School for Environment and Sustainability via Flickr Creative Commons

“The Discovery of Global Warming: The Public and Climate Change” The American Institute of Physics, https://history.aip.org/climate/timeline.htm