Timeline

Timeline

1845 – Walden Pond

1847 – George Perkins Marsh

1864 –Yosemite Valley

1864 – The Maine Woods 

1866 – Ernst Haeckel

1872 – Yellowstone

1872 – Mining Law

1876 – Appalachian Mountain Club

1886 – Audubon Society

1890 – Yosemite and General Grant National Parks

1872 – Mining Law 

1890 – Sequoia National Park

1891 – Forest Reserve Act

1892 – Sierra Club

1893 – Forest Reserves

1898 – Gifford Pinchot

1901 – Sierra Club Outing

1903 – Teddy Roosevelt Visits Yosemite

1905 – Yosemite Under Federal Control

1910 – Lakeview Gusher

1914 – Hetch Hetchy Valley

1915 – John Muir Trail

1916 – National Park Service

1945 – Wilderness Society

1948 – Donora Zinc Works

1949 – Sand County Almanac

1952 – David Brower

1955 – Dinosaur National Monument

1962 – Silent Spring

1965 – Storm King Mountain

1964 – Wilderness Act

1966 – Grand Canyon

1968 – Grand Canyon Dam Plan Killed

1969 – Santa Barbara Oil Spill

1969 – National Environmental Policy Act

1970 – Earth Day

1970 – Clean Air Act

1972 – DDT

1972 – Water Pollution Control Act

1973 – Endangered Species Act

1977 – Tellico Dam

1978 – Love Canal

1979 – Three Mile Island

1980 – Alaska Natural Interest Lands Conservation Act

1986 – Chernobyl

1989 – Exxon Valdez Disaster

1994 – Mono Lake

1994 – Unolcal Diluent Spill

1997 – Julia Butterfly Hill

1998 – David Gypsy Chain

1999 – Luna

2005 – Kyoto Protocol