The first Earth Day was celebrated on April 22, 1970, marking a pivotal moment in the environmental movement. Initiated by U.S. Senator Gaylord Nelson, the event aimed to raise public awareness about pollution and environmental degradation. Millions of Americans participated in rallies, educational programs, and community clean-up efforts, leading to the establishment of the Environmental Protection Agency and the passage of key environmental legislation. Earth Day is now celebrated globally, highlighting the ongoing importance of environmental stewardship.

This event sparked a movement in eco-poetry, encouraging poets to address environmental themes and the relationship between humanity and nature. Notable poets like Gary Snyder and Mary Oliver emerged, using their work to advocate for ecological awareness and celebrate the natural world.