Enviormental Timeline

By serena947

  • William Penn

    William Penn
    Pennsylvania colony governer Wlliam Penn ordered colonist to conserve one tree for every five cut down.

  • The Lacey Act

    The Lacey Act
    Hunting in the Yellowstone National PPark was illegal.

  • Floods

    Floods
    Raker Act was passed because of the flooding of Hetch Hetchy Valley and the building of O'Shaughnessy Dam, in Yosemite National Park.

  • The Closing

    The Closing
    Heavy smog affected the air which caused the city officials to close Los Angeles schools.

  • Water Quality Act

    Water Quality Act
    Water pollution was a problem because of that President Johnson sighned the Water Quality Act.

  • Endangered Species

    Endangered Species
    Congress are trying to keep animals from getting extinct,so they passed the Endangered Species Act.

  • NASA

    NASA
    NASA warned Congress of the effects of global warming

  • Global Warming

    Global Warming
    The Earth Summit held in Rio de Janerio,was to pledge control over global warming.

  • Julia Butterfly Hill

    Julia Butterfly Hill
    Julia Butterfly Hill 25 years old lived for 735 days in a 180 ft tall California Redwood Tree and kept it from getting destroyed.

  • Clean Air Act

    Clean Air Act
    Congress wanted to regulate air pollution and emissions so they created a new act.