Eric Walker added a number of topics and a number of links to Acts of the US Congress, and added Acts of the US Congress to Law in the United States

Eric Walker added a number of topics and a number of links to The environment, the Earth's ecosystem, ecology and environmentalism, and added The environment, the Earth's ecosystem, ecology and environmentalism to Nature, Science, engineering, mathematics and the humanities and "Earth" (deleted)

Eric Walker added a number of topics to US federal environmental legislation, and added US federal environmental legislation to The environment, the Earth's ecosystem, ecology and environmentalism and Acts of the US Congress

Eric Walker added Endangered Species Act of 1973 - Wikipedia and Big Money Bought the Forests. Small Logging Communities Are Paying the Price. to Endangered Species Act, and added Endangered Species Act to US federal environmental legislation and Acts of the US Congress

Eric Walker added a number of links to Clean Air Act, and added Clean Air Act to US federal environmental legislation

Eric Walker added Inside the Koch Brothers’ Toxic Empire – Rolling Stone and E.P.A. Limits States’ Power to Oppose Pipelines and Other Energy Projects - The New York Times to 1972 Clean Water Act, and added 1972 Clean Water Act to US federal environmental legislation

Eric Walker added A Trailblazing Plan to Fight California Wildfires | The New Yorker to 1969 National Environmental Policy Act, and added 1969 National Environmental Policy Act to US federal environmental legislation