The U.S. EPA finds the Valley of the Drums, an open-air dump in Kentucky, with drums leaking chemical waste.
The Three Mile Island nuclear power plant accident occurs in Pennsylvania.
President Carter declares a federal emergency at Love Canal, a former chemical landfill in the City of Niagara Falls, New York.
The Federal Clean Water Act passes.
The Federal Resource Conservation and Recovery Act (RCRA) passes.
The U.S. EPA is established by President Nixon.
The Federal Clean Air Act passes.
The Federal Occupational Safety and Health Act passes.
20 million people celebrate the first Earth Day.