A little girl runs around one of 23 one-tonne globes placed along the seawall outside Science World in downtown Vancouver, Thursday, April 22, 2010. The globe collection entitled Cool Globes: hot ideas for a cooler planet, all have ideas for keeping the earth cooler and were unveiled as a part of Earth Day celebrations.
THE CANADIAN PRESS/Jonathan Hayward
A man and his son ride their bikes past one of 23 one-tonne globes placed along the seawall outside Science World in downtown Vancouver, Thursday, April 22, 2010. The globe collection entitled Cool Globes: hot ideas for a cooler planet, all have ideas for keeping the earth cooler and were unveiled as a part of Earth Day celebrations.
THE CANADIAN PRESS/Jonathan Hayward
A woman is silhouetted as she runs past one of 23 one-tonne globes placed along the seawall outside Science World in downtown Vancouver, Thursday, April 22, 2010. The globe collection entitled Cool Globes: hot ideas for a cooler planet, all have ideas for keeping the earth cooler and were unveiled as a part of Earth Day celebrations.
THE CANADIAN PRESS/Jonathan Hayward
Ontario Premier Dalton McGuinty participates in an Earth Day event at the Tecumseh Public School in London, Ont., on Thursday, April 22, 2010.
THE CANADIAN PRESS/Nathan Denette
President Barack Obama waves to the crowd after speaking at an Earth Day reception in the Rose Garden of the White House in Washington, Thursday, April 22, 2010.
AP Photo/Susan Walsh
Actress Sigourney Weaver attends the Earth Day reception in the Rose Garden of the White House with President Barack Obama, right, in Washington, Thursday, April 22, 2010.
AP Photo/Susan Walsh
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.
AP Photo/Bernat Armangue
An Israeli man rests after cycling, during a concert in Rabin Square that is powered by a team of cyclists, in front of the municipality building which had switched off its lights in Tel Aviv to mark the international Earth Day, Thursday, April 22, 2010. Thirteen of Israel's large metropolitan areas turned off their lights for one hour Thursday night, in favor of energy conservation and the environment.
AP Photo/Oded Balilty
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.
AP Photo/Bernat Armangue
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.
AP Photo/Cliff Owen
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.
AP Photo/Luis Benavides
Paul Ruta, right, and Darien McElwain drive a horse-drawn wagon on a street in Montpelier, Vt., Thursday, April 22, 2010. They were giving wagon rides as part of an Earth Day celebration sponsored by the Hunger Mountain Coop.
AP Photo/Toby Talbot
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.
AP Photo/Nick Ut
Workers construct a speaker and light tower on the Mall in Washington, Thursday, April 22 in preparation for an Earth Day rally and concert Sun. April 25, 2010.
AP Photo/Cliff Owen
Actor Kristin Bauer makes a whale tail sign with her hands while addressing a rally against commercial whaling on the Mall in Washington, Thursday, April 22, 2010.
AP Photo/Cliff Owen
Aaron Shyr, left, and Akram Khatib celebrate with the music during Earth Day and International Festival events on the campus of Indiana University-Purdue University Indianapolis in Indianapolis, Thursday, April 22, 2010.
AP Photo/Darron Cummings
Li Yannan walks around a fountain during Earth Day and International Festival events on the campus of Indiana University-Purdue University Indianapolis in Indianapolis, Thursday, April 22, 2010.
AP Photo/Darron Cummings
South Korean environmental activists have their faces painted as characters from James Cameron's movie "Avatar" as they participate in a rally to mark the 40th anniversary of Earth Day in downtown Seoul, South Korea, Thursday, April 22, 2010.
AP Photo/Ahn Young-joon
South Korean environmental activists have their faces painted as characters from James Cameron's movie "Avatar" as they perform during a rally to mark the 40th anniversary of Earth Day in downtown Seoul, South Korea, Thursday, April 22, 2010.
AP Photo/Ahn Young-joon
Environmentalists wear colorful headdresses as they march to mark Earth Day Thursday, April 22, 2010, in Quezon City north of Manila, Philippines. 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.
AP Photo/Pat Roque
Environmentalists march to mark Earth Day Thursday, April 22, 2010, in Quezon City north of Manila, Philippines. 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.
AP Photo/Pat Roque
A Moldovan boy leaps off a tree stump in Chisinau, Moldova ,Thursday April 22, 2010. Thursday is the 40th anniversary of the celebration of Earth Day.
AP Photo/John McConnico
Schoolchildren look at a discarded gas tank in a polluted stream in Chisinau, Moldova Thursday April 22, 2010. Thursday is the 40th anniversary of the celebration of Earth Day.
AP Photo/John McConnico
Birds are seen in the Pantanos de Villa nature reserve in Lima, Thursday, April 22, 2010. Today is the 40th anniversary of the celebration of Earth Day.
AP Photo/Martin Mejia
Birds fly in the Pantanos de Villa nature reserve in Lima, Thursday, April 22, 2010. Today is the 40th anniversary of the celebration of Earth Day.
AP Photo/Martin Mejia
Fausto Guamuch and his daughter Ana Lucia, both members of the Kaqchiquel indigenous group, take a break during a rally to celebrate the Earth Day in downtown Guatemala City, Thursday, April 22, 2010.
AP Photo/Moises Castillo
Members of Cuba's Giganteria group set fire on a giant figure known as "La Tarasca", during a rally to mark the International Earth Day in Havana, Thursday, April 22, 2010. People filled "La Tarasca" with messages and then burnt it to cleanse themselves of bad things and hate.
AP Photo/Javier Galeano
Members of Cuba's Giganteria group carry a giant figure known as"La Tarasca" during a rally to mark the International Earth Day in Havana, Thursday, April 22, 2010. People filled "La Tarasca" with messages and then burnt it to cleanse themselves of bad things and hate.
AP Photo/Javier Galeano
A member of Cuba's Giganteria group dances next to a burning figure known as "La Tarasca" during a rally to mark the International Earth Day in Havana, Thursday, April 22, 2010. People filled "La Tarasca" with messages and then burnt it to cleanse themselves of bad things and hate.
AP Photo/Javier Galeano
Michelle Rodriguez, at left arrives at The Green Carpet and Home Tree Earth Day celebration at The JW Marriott on Thursday April 22, 2010, in Los Angeles.
AP Photo/Katy Winn
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