Timeline for science

Tree Conserves

Mar 4, 1681

Pennsylvania colony governor William Penn ordered colonists to conserve one tree for every five cut down.

The Lacy Act

May 25, 1900

The Lacey Act prohibited the transport of illegally obtained wildlife across state lines, and outlawed hunting in Yellowstone National Park.

National Park Service

Aug 25, 1916

Congress established the National Park Service. Today there are approximately 400 national parks across America, comprising approximately 4% of the entire U.S., or 84.6 billion acres of preserved land.

Air Pollution Survey

Jan 1, 1926

Salt Lake City was the first U.S. city to conduct a large scale survey of air pollution.

Bald Eagle Preservation Act

Jun 8, 1940

Congress passed the Bald Eagle Preservation Act to prevent the extinction of the national symbol. The bald eagle was removed from the endangered species list in 2007.

Water Quality Act

Oct 2, 1965

President Johnson signed the Water Quality Act to strengthen federal water pollution laws and outline water quality guidelines for states.

Global Warming Warning

Jun 23, 1988

NASA warned Congress of the effects of global warming.

The Earth Summit

Jun 3, 1992

The Earth Summit held in Rio de Janeiro, resulting in the signing of the Convention on Climate Change and the Earth Charter, a global pledge to control global warming.

Live Concert Awareness

Jun 28, 2007

Live Earth concerts around the world featured Madonna, the Black Eyed Peas, the Red Hot Chili Peppers, Metallica, and the Beastie Boys, to raise awareness of climate change.

Great Lakes Compact

Dec 8, 2008

Great Lakes Compact signed by all eight Great Lakes states in an attempt to prevent distribution and sale of water to non-regions.