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By the early 20th century, the federal government held significant portions of most western states that had simply not been claimed for any use. Conservationists prevailed upon President Theodore Roosevelt to set aside lands for forest conservation and for special scientific or natural history interest. Much land still remained unclaimed even ...
Both conservationists and preservationists appeared in political debates during the Progressive Era (the 1890s–early 1920s). There were three main positions. There were three main positions. Laissez-faire: The laissez-faire position held that owners of private property, including lumber and mining companies, should be allowed to do anything ...
The Evolution of the Conservation Movement, 1850–1920 is an online exhibition from the Library of Congress' American Memory series. It documents the historical formation and cultural foundations of the movement to conserve and protect America's natural heritage, through books, pamphlets, government documents, manuscripts, prints, photographs, and motion picture footage drawn from the ...
This timeline of the history of environmentalism is a listing of events that have shaped humanity's perspective on the environment. This timeline includes human induced disasters, environmentalists that have had a positive influence, and environmental legislation .
John Muir was one of the founding fathers of the preservation movement in the United States in the late 19th century. He believed that nature had intrinsic value and viewed nature as a sacred religious temple, which opposed the view of many utilitarian conservationists. One of Muir’s first endeavors was helping create Yosemite National Park.
This timeline lists events in the external environment that have influenced events in human history. This timeline is for use with the article on environmental determinism. For the history of humanity's influence on the environment, and humanity's perspective on this influence, see timeline of history of environmentalism. See List of periods ...
1.1 1920s. 1.2 1940s. 1.3 1950s. 1.4 1960s. 1.5 1970s. 1.6 1980s. ... Some of the more notable events are listed here with a full list on the respective pages ...
1920s portal; These articles relate to the natural environment in the decade 1920s. They include the human impact on the environment, environmental law, conservation, environmentalism and environmental issues.