An ultra-Orthodox Jewish man walks next a projection of lights over the walls of Jerusalem's Old City during an event to mark the international Earth Day, Thursday, April 22, 2010.
Earth Day in Israel
An Israeli girl wearing a light ring watches a projection of lights over the walls of Jerusalem's Old City during an event to mark the international Earth Day, Thursday, April 22, 2010.
Earth Day in Israel
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.
Earth Day in Indianapolis
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.
Earth Day in Indianapolis
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.
Earth Day in Washington
Douglas Bruchalski, of Washington D.C., takes part in a rally against commercial whaling on the Mall in Washington, Thursday, April 22, 2010.
Earth Day in Washington
Demonstrators rally against commercial whaling on the Mall in Washington, Thursday, April 22, 2010.
Earth Day in Washington
Carolyn Auwaerter, of Philadelphia, takes part in a rally against commercial whaling on the Mall in Washington, Thursday, April 22, 2010.
Earth Day in Washingon
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.
Earth Day in Columbia
A main avenue is empty of private cars is 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.
Earth Day in South Korea
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.
Earth Day in South Korea
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, South Korea, Thursday, April 22, 2010.
Earth Day in the Philippines
A group of environmentalists ride bicycles as a means of encouraging people to conserve the environment while marking Earth Day on Thursday, April 22, 2010, in Quezon City, north of Manila, Philippines.
Earth Day in the Philippines
Environmentalists march to mark Earth Day on 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.
Earth Day in the Philippines
Protesters rally to mark Earth Day on Thursday, April 22, 2010, in front of the Department of Environment and Natural Resources in, Quezon City, north of Manila, Philippines.
Earth Day in Bethlehem, Pa.
Nicole DeAngelis of Cherry Hill, N.J., a junior at Lehigh University, hangs an original Earth Day flag, originally made in 1970 by a member of the university's administrative staff, in front of the University Center in Bethlehem, Pa., during Lehigh's celebration of Earth Day on Wednesday, April 21, 2010.