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Benjamin Franklin
Philadelphia committee led by Benjamin Franklin attempts to regulate waste disposal and water pollution. -
Declaration Of Independence
One of the most important documents in U.S. history. An official act taken by all 13 American colonies in declaring independence. -
Constitution of the United States of America
When America's national government and fundamental laws and guaranteed certain basic rights for its citizens. -
Henry David Thoreau
Henry David Thoreau published Walden. -
Battle of Gettysburg
It was a union victory that stopped General Robert E. Lee's second invasion of the North. -
Ernst Haeckel
The term ecology is coined in German as Oekologie by Ernst Heinrich Philipp August Haeckel -
Robert Smith
The term acid rain is coined by Robert Angus Smith in the book Air and Rain. -
Plessy v. Ferguson
It was a landmark decision of the U.S. Supreme Court that confirmed the constitutionality of racial segregation for public facilities. -
Henry Voeux
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. -
Stock Market Crash
It was a four day collapse of stock prices that began on October 24th. -
FDR's First Fireside Chat
When a series of evening radio addresses given by U.S. president Franklin D. Roosevelt. From the year of 1933-1944. -
The Atomic Bombing of Hiroshima and Nagasaki
A month later after the United States detonates the first atomic bomb at a test site in New Mexico. Less than a month later, atomic bombs were dropped on these two Japanese cities. -
U.S. Army: McCarthy Hearings
A series of hearings held by the United States Senate's Subcommittee on Investigations. to investigate conflicting accusations between the United States Army and U.S. Senator Joseph McCarthy. From April-June in 1954 -
Rachel Carson
Rachel Carson publishes Silent Spring. -
The Apollo 8
The Apollo 8 picture of Earthrise. -
The Assassination of Martin Luther King, Jr.
Martin Luther King Jr. became the most visible spokesperson and leader in the Civil Rights Movement from1955, until he was assassinated. -
Earth Day
Earth Day – April 22., millions of people gather in the United States for the first Earth Day organized by Gaylord Nelson, former senator of Wisconsin, and Denis Hayes, Harvard graduate student. US Environmental Protection Agency established. -
Montreal Protocol
Montreal Protocol on substances that deplete the ozone layer entered into force. -
The Kyoto Protocol Negotiate
The Kyoto Protocol was negotiated in Kyoto, Japan in December. Countries that ratify this protocol commit to reduce their emissions of carbon dioxide and five other greenhouse gases. -
The Kyoto Protocol Reject
U.S. rejects the Kyoto Protocol -
9/11 Attacks
A series of four coordinated terrorist attacks by an Islamic terrorist group against the United States.
