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Philadelphia committee
Philadelphia committee led by Benjamin Franklin attempts to regulate waste disposal and water pollution. -
Henry David Thoreau
Henry David Thoreau published Walden -
Ecology
The term ecology is coined in German as Oekologie by Ernst Heinrich Philipp August Haeckel -
Acid Rain
The term acid rain is coined by Robert Angus Smith in the book Air and Rain -
Smog
The term smog is coined by Henry Antoine Des Voeux in a London meeting to express concern over air pollution -
U.S. Congress
US Congress created the National Park Service -
Sputnik 1
First artificial Earth satellite, U.S.S.R. -
Laika the Dog Aboard Sputnik 2
First animal launched into space, U.S.S.R. -
Luna 2
First spacecraft to hard-land on another celestial object; The Moon , U.S.S.R. -
Luna 3
First pictures of the far side of the Moon, U.S.S.R. -
Yuri Gagarin on Vostok 1
First human to orbit Earth, U.S.S.R. -
Rachel Carson
Rachel Carson published Silent Spring -
Mariner 2
First data returned from another planet, U.S. -
Valentina Tereshkova on Vostok 6
First woman in space, U.S.S.R. -
Aleksey Leonov on Voskhod 2
First space walk, U.S.S.R. -
Mariner 4
First spacecraft pictures of Mars, U.S. -
Vladamir Komarov on Soyuz 1
First death during a space mission, U.S.S.R. -
Apollo 8 Earthrise
The Apollo 8 picture of Earthrise -
First Earth Day
First Earth Day (April 22) Millions of people gather in the United States for the first Earth Day. US Environmental Protection Agency established. -
Montreal Protocol
Montreal Protocol on substances that deplete the ozone layer entered into force. -
Kyoto Protocol
The Kyoto Protocol was negotiated in Kyoto, Japan in December. Countries that ratify this protocol commit to reduce their emissions of carbon dioxide. -
U.S. Rejects the Kyoto Protocol
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Climate Change Agreement
U.S. announces it will cease participation in the Paris Agreement on climate change mitigation. -
Climate Change Agreement
U.S. announces it will rejoin the Paris Agreement on climate change mitigation.