Friends of the Earth: A History of American Environmentalism with 21 Activities

Friends of the Earth: A History of American Environmentalism with 21 Activities — page 3
Cordelia 1934 Roger Tory Peterson creates his bird identifica tion system 1935 TheWildnernessSocietyisformed 1947 Marjory Stoneman Douglas's River of Grass is published Everglades National Park is created Marjory 1949 Aldo Leopold's Sand County Almanac is pub lished 1960 Arctic National Wildlife Reserve is created due to efforts by Mardie and Olaus Murie 1962 Rachel Carson's Silent Spring is published 1964 The Wilderness Act is passed 1970 The Clean Air Act is passed The first Earth Day is observed