

A large globe, with the US Capitol in the background, is seen on the Mall as part of Earth Day celebrations on April 22. Cliff Owen/AP
A main avenue in Medellin, Colombia, has light traffic during "A Day Without Cars." The event is held to mark the 40th anniversary of Earth Day on April 22. Luis Benavides/AP
Demonstrators take part in a rally against commercial whaling hosted by Greenpeace, The Humane Society, Animal Welfare Institute, and others on the Mall in Washington on April 22. Cliff Owen/AP
Lights are projected on the walls of Jerusalem's Old City on April 22 to mark Earth Day. Bernat Armangue/AP
A Greenpeace activist painted as the earth performs during an Earth Day event in Valparaiso, Chile, on April 22. Eliseo Fernandez/Reuters
A Salvadoran girl holds a banner during a march for Earth Day in San Salvador on April 22. Luis Galdamez/Reuters
Wilderness guide Stuart Wilde (r.) of New Mexico, leads a llama named K-2 as Michael Carlin leads llama Raja down Sunset Boulevard in Los Angeles, Calif., 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, and lessen traffic. Nick Ut/AP
Schoolchildren arrive to plant trees during celebrations for Earth Day in Lima, Peru, on April 22. About 2,000 schoolchildren participated in the planting of 3,000 trees during an activity organized by local authorities to promote environmental awareness. Enrique Castro-Mendivil/Reuters
Salvadoran children dressed as a bear and a parrot participate in a march to mark Earth Day in San Salvador on April 22. Luis Galdamez/Reuters
Staff and volunteers from the Turtle Hospital watch a 200-pound male Loggerhead turtle, Pal, make its way into deeper water off the Florida Keys on April 22 in Marathon, Fla. The turtle was released on Earth Day after being treated for more than a month for an impacted digestive system. Andy Newman/Florida News Bureau/AP
South Korean environmental activists painted as characters from James Cameron's movie 'Avatar,' perform during a rally to mark the 40th anniversary of Earth Day in downtown Seoul on April 22. Ahn Young-joon/AP
Members of Barb Andersen's third grade class from Elrod Elementary School wait outside Super 1 Foods in Kalispell, Mont., on April 20. The students borrowed 300 bags from the grocery store and decorated them with Earth Day themed art. They will give the bags back to customers shopping at Super 1 Foods on Thursday as part of Earth Day celebrations. Brenda Ahearn/Daily Inter Lake/AP
An Indian municipal worker dumps garbage near waste water flowing out of an industrial area on the outskirts of Jammu, India, on Earth Day. Channi Anand/AP
An Indian rag picker carries bags as he walks through plastic waste on the outskirts of Jammu, India, on April 22. Channi Anand/AP
Environmentalists wear colorful headdresses as they march to mark Earth Day in Quezon City, Manila, Philippines, on April 22. The group called on the people to elect a progressive and environmental leader to replace President Gloria Macapagal Arroyo whom they claim to be the most environmentally disastrous president. Pat Roque/AP
Nicole DeAngelis, a junior at Lehigh University, hangs an original 40-year-old Earth Day flag, originally made in 1970 by a member of the university's staff, in front of the University Center in Bethlehem, Pa., during Earth Day celebrations on campus on April 21. Joe Gill/The Express-Times/AP
Schoolchildren look at a discarded gas tank in polluted stream in Chisinau, Moldova, on Earth Day, April 22. John McConnico/AP
A Canada goose shares a log with two turtles at the Shaker Lakes Nature Center in Shaker Hts., Ohio, on April 21. The Nature Center was founded in 1966 in an effort to protect the Shaker Parklands, which would have been destroyed at the time by a proposed freeway. April 22 is the 40th anniversary of Earth Day. Amy Sancetta/AP
Ahead of Earth Day, Vice President Joe Biden announces a new energy-efficiency program during an event at the Eisenhower Executive Office Building in Washington on April 21. Susan Walsh/AP