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Philadelphia Water Comittee
Philadelphia committee led by Benjamin Franklin attempts to regulate waste disposal and water pollution. -
Walden
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 -
National Park Service
US Congress created the National Park Service -
Explorer 6
First photograph of Earth taken from the orbit -
OSO-1
First orbital solar observatory -
Silent Spring
Rachel Carson published Silent Spring -
Apollo 8
First piloted orbit around the moon. -
Earthrise
The Apollo 8 picture of Earthrise -
Apollo 11
First human on the moon. -
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 -
Mariner 10
First photograph of Venus from Space -
Voyager 1
First photograph of the entire solar system. -
Ozone Layer
Montreal Protocol on substances that deplete the ozone layer entered into force -
NEAR shoemaker
First landing on an asteroid. -
Stardust
First sample return from a comet. -
Kepler Mission
First space telescope designated to search for Earth-like exoplanets -
MESSENGER
First orbit of Mercury