WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.A blue flag with an image of plant earth flies over an environmental protest event.WASHINGTON, DC - OCTOBER 24: An environmental activist wears a shirt saying, "More Trees Please" and flies a flag with the planet earth during the International Day of Climate Action on October 24, 20A blue flag with an image of plant earth flies over an environmental protest event.A blue flag with an image of plant earth flies over an environmental protest event.A blue flag with an image of plant earth flies over an environmental protest event.WASHINGTON, DC - OCTOBER 24: An environmental activist wears a shirt saying, "More Trees Please" and flies a flag with the planet earth during the International Day of Climate Action on October 24, 20WASHINGTON, DC - OCTOBER 24: An environmental activist wears a shirt saying, "More Trees Please" and flies a flag with the planet earth during the International Day of Climate Action on October 24, 20WASHINGTON, DC - OCTOBER 24: Environmental activists fly a flag with the planet earth during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists fly a flag with the planet earth during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: An environmental activist holds a sign saying, "Green Love" during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: An environmental activist holds a sign saying, "Green Love" during the International Day of Climate Action on October 24, 2009.WASHINGTON, DC - OCTOBER 24: Environmental activists, in more than 150 nations and 4300 events, call for action on climate change during the International Day of Climate Action on October 24, 2009.