Since the first Earth Day, the annual average concentration of carbon dioxide in the atmosphere has increased by more than 30%. It is now rising at the fastest rate on record, according to the ...

Climate conditions affecting the planet continue to develop since the first Earth Day was celebrated in 1970. CBS News' David Schechter breaks down the newest challenges the Earth is facing.

Earth Day is celebrated on April 22 each year, promoting environmental protection and awareness since 1970.. Now celebrating its 55th anniversary, this year's Earth Day theme, "Our Power, Our ...

From the archives: 1970 Earth Day special report with Walter Cronkite 53:39. Earth Day has been recognized in the United States on April 22 since 1970.The day spurred action in Washington, D.C ...

It's been more than 50 years since the first Earth Day in the United States. On April 22, 1970, people gathered at events across the country to raise awareness about the environmental issues ...

It's been more than 50 years since the first Earth Day in the United States. On April 22, 1970, people gathered at events across the country to raise awareness about the environmental issues ...

It's been more than 50 years since the first Earth Day in the United States. On April 22, 1970, people gathered at events across the country to raise awareness about the environmental issues ...