A woman walks through the towering trees in Valea Morilor park in Chisinau, Moldova Thursday April 22, 2010. Thursday is the 40th anniversary of the celebration of Earth Day.
Andy Newman photo
In this photo released by the Florida Keys News Bureau, staff and volunteers from the Turtle Hospital release a 200-pound, male Loggerhead sea turtle named “Pal” off the Florida Keys Thursday, April 22, 2010, in Marathon, Fla. The turtle was treated with antibiotics and laxatives for an impacted digestive system, before being released on Earth Day. Hospital administrator Ryan Butts is left front and founder/director Richie Moretti is front right.
Luis Benavides photo
A main avenue is empty of private cars on A Day Without Cars seen from a bridge decorated with a statue of a pedestrian in Medellin, Colombia, Thursday, April 22, 2010. The Day Without Cars marks the 40th anniversary of Earth Day.
Saurabh Das photo
A girl scavenges for plastic and other items that can be sold to scrap dealers, at a garbage dump on the outskirts of New Delhi, India, Thursday, April 22, 2010. Thursday marks the 40th anniversary of Earth Day which aims to urge local action and increase awareness about the state of the world�s environment.
Nick Ut photo
New Mexico wilderness guide Stuart Wilde, right, leads a llama named K-2, as Michael Carlin leads Raja down Sunset Boulevard in Los Angeles Thursday, April 22, 2010, in honor of Earth Day. The two men brought the llamas into the city to inspire people to park their cars, go for a walk to ease traffic and help save the planet.
Cliff Owen photo
A large globe, with the U.S. Capitol in the background, on the Mall as part of Earth Day celebrations in Washington, Thursday, April 22, 2010.
Bernat Armangue photo
A projection of lights are seen over the walls of Jerusalem’s Old City during an event to mark the international Earth Day, Thursday, April 22, 2010.
Kathy Plonka photo
Katie Givens, 11, of Hayden helps clean up Independence Point in Coeur d’Alene on Earth Day, Thursday, April 22, 2010. The event was organized by Cub Scout Pack 293.
Kathy Plonka photo
Deborah Kirk and her son Noah, 7, of Hauser Lake participate in the clean up of Independence Point in Coeur d’Alene on Earth Day, Thursday, April 22, 2010.
Moises Castillo photo
Fausto Guamuch and his daughter Ana Lucia, both members of the Kaqchiquel indigenous group, take a break during a Earth Day rally in downtown Guatemala City on Thursday, April 22, 2010.
Darron Cummings photo
Li Yannan walks around a fountain during Earth Day and International Festival events on the campus of Indiana University-Purdue University Indianapolis in Indianapolis on Thursday, April 22, 2010.