Getty Images 7 months ago

This NASA image obtained on Earth Day, April 22, 2009, shows the south end of Eleuthera Island in the Bahamas shimmering in turquoise waters in this 2002 photo from the International Space Station.

Getty Images 7 months ago

This NASA image obtained on Earth Day, April 22, 2009, from Apollo 17, shows the first view of the south polar ice cap. Almost the entire coastline of Africa is visible, along with the Arabian Peninsula.

Getty Images 7 months ago

This NASA image obtained on Earth Day, April 22, 2009, acquired on December 2, 2005 by the Advanced Spaceborne Thermal Emission and Reflection Radiometer, or ASTER, aboard NASA's Terra Earth-orbiting satellite, shows the Rub' al Khali, the Empty Quarter, one of the largest sand deserts...

Getty Images 7 months ago

This NASA image obtained on April 22, 2009, Earth Day, a composite image, which has become a popular poster, showing a global view of Earth at night, compiled from over 400 satellite images. NASA researchers have used these images of nighttime lights to study weather around urban areas.

Getty Images 7 months ago

This NASA image obtained on April 22, 2009, Earth Day, shows the first photo of Earth from a weather satellite, taken by the TIROS-1 satellite on April 1, 1960.

Getty Images 7 months ago

This NASA image obtained on April 22, 2009, Earth Day, shows the Earthrise over the moon made on Christmas Eve, December 24, 1968 from Apollo 8, the first manned mission to the moon, as it entered lunar orbit.

AP Photo 7 months ago

Candidates for this year's Miss Philippines-Earth beauty pageant, cheer from their electric vehicle as they make their way along a busy avenue around Manila to encourage people to find ways for alternative sources of energy as the Philippines join the rest of the world marking Earth Day...

School children watch divers unfurl a poster that reads "Earth Day" in Jakarta's Sea World April 18, 2009 ahead of Earth Day on April 22.

Divers unfurl a poster that reads "Earth Day" in Jakarta's Sea World April 18, 2009 ahead of Earth Day which falls on April 22.

AP Photo 7 months ago

Divers display a banner that reads, "Earth Day Under the Sea 2009," inside an aquarium at the Sea World in Jakarta, Indonesia, Saturday, April 18, 2009.

AP Photo 8 months ago

Disney Store's new Earth Day tote bag is made from fabric created from recycled water bottles.

AP Photo 8 months ago

Disney Store's new Earth Day tote bag is made from fabric created from recycled water bottles.

AP Photo 7 months ago

Exelon Chief Human Resources Officer Andrea Zopp leads a group of employee volunteers in planting trees in Washington Park in Chicago on Earth Day, April 22, 2009, during National Volunteer Week.

AP Photo 7 months ago

A projection illuminates the Tower of David and the walls of Jerusalem's Old City, seen after the main lights were turned off for Earth Hour, Thursday, April 23, 2009.

AP Photo 7 months ago

This comination of two pictures shows The Tower of David and the walls of Jerusalem's Old City before, top, and after the lights were turned off for Earth Hour, Thursday, April 23, 2009.

AP Photo 7 months ago

The Tower of David and the walls of Jerusalem's Old City, seen after the lights were turned off for Earth Hour, Thursday, April 23, 2009. The Jerusalem municipality switched off the lights of the walls of the Old CIty for one hour Thursday evening in recognition of Earth Day.

AP Photo 7 months ago

Israelis watch dancers carrying lights after the main lights of Jerusalem's Old City were turned off for Earth Hour, Thursday, April 23, 2009. The Jerusalem municipality switched off the lights of the walls of the Old City for one hour Thursday evening in recognition of Earth Day.

AP Photo 7 months ago

Green Youth Movement founder Ally Maize (second from left) plants the sustainable garden with her parents, Richard Maize (left), Rochelle Maize (back, standing) and two Archer School friends on Earth Day 2009.

Getty Images 7 months ago

A Western Lowland gorilla at Lincoln Park Zoo enjoys special Earth Day enrichment activities on April 22, 2009 in Chicago, illinois. For the past two months, Lincoln Park Zoo volunteers have been creating colorfully-painted pi�s designed especially for them.

U.S. President Barack Obama waits to speak at the wind energy production facility, Trinity Structural Towers Manufacturing Plant, during an Earth Day visit in Newton, Iowa, April 22, 2009.

Mexico's President Felipe Calderon (R) shakes hands with a farmer during a celebration of Earth Day in Cancun in Mexico's state of Quintana Roo April 22, 2009.

U.S. President Barack Obama speaks at the wind energy production facility, Trinity Structural Towers Manufacturing Plant, during an Earth Day visit in Newton, Iowa, April 22, 2009.

U.S. President Barack Obama walks towards Air Force One before departing Andrews Air Force outside Washington for an Earth Day event in Iowa, April 22, 2009.

U.S. President Barack Obama poses with workers after he speaks at the wind energy production facility, Trinity Structural Towers Manufacturing Plant, during an Earth Day visit in Newton, Iowa, April 22, 2009.

U.S. President Barack Obama bends underneath a guard to pose with workers after speaking at the wind energy production facility, Trinity Structural Towers Manufacturing Plant, during an Earth Day visit in Newton, Iowa, April 22, 2009.