Global Warming | ISSUE

Local residents line up to collect potable water from a public tap in Managua on March 16, 2010. The effects of global warming are already affecting one in four Central Americans and the problem will worsen in the isthmus unless developed countries take measures to reduce their emissions of gases, experts in climate change of the Central American Integration System (SICA) meeting this week in Panama, warned.

Local residents line up to collect potable water from a public tap in Managua on March 16, 2010. The effects of global warming are already affecting one in four Central Americans and the problem will worsen in the isthmus unless developed countries take measures to reduce their emissions of gases, experts in climate change of the Central American Integration System (SICA) meeting this week in Panama, warned.

A woman walks down steps which feature a painted promotional design for the upcoming Earth Hour event at a bank in Hong Kong Tuesday, March 16, 2010. Earth Hour 2010 takes place on Saturday, March 27, at 8.30 pm local time and is a global call to turn off lights for 60 minutes in a bid to highlight the global climate change.

British Foreign Secretary David Miliband stands next to a large solar panel during a visit to a clean energy research center in Langfang of Heibei Province, China, Monday, March 15, 2010. Britain's foreign secretary is visiting China to lobby for further nuclear sanctions on Iran and will seek to smooth rancor with Beijing over climate change talks and the execution of a British drug smuggler thought to be mentally ill.

EU commissioner for environment Janez Potocnik (L) Spanish minister for the environment Elena Espinosa Mangana (C) Spanish state secretary for climate change Ms Teresa Ribera Rodriguez talk together prior to an EU Environment Council meeting at the EU headquarters in Brussels on March 15, 2010.

EU commissioner for Environment Janez Potocnik (L) and Spanish State Secretary for Climate Change Teresa Ribera Rodriguez talk together prior to an EU Environment Council meeting at the EU headquarters in Brussels on March 15, 2010.

EU commissioner for Environment Janez Potocnik (L) and Spanish State Secretary for Climate Change Teresa Ribera Rodriguez talk together prior to an EU Environment Council meeting at the EU headquarters in Brussels on March 15, 2010.

Sen. John Kerry, D-Mass. talks about efforts to pass energy and climate change legislation, during an interview with The Associated Press interview in his office on Capitol Hill in Washington, Thursday, March 11, 2010.

Sen. John Kerry, D-Mass. talks about efforts to pass energy and climate change legislation, during an interview with The Associated Press interview in his office on Capitol Hill in Washington, Thursday, March 11, 2010.

In this undated photo provided by the New South Wales National Parks and Wildlife Service a Yellow-spotted Bell Frog is captured as student Ben Scheele, left, David Hunter, threatened species officer with the Department of Climate Change and Water, and Michael McFadden, right, observe the frog in the Southern Tablelands of New South Wales state of Australia. The species of frog thought to have been extinct for 30 years has been discovered in rural Australian farmland, officials said Thursday, March 4, 2010.

In this undated photo provided by the New South Wales National Parks and Wildlife Service a Yellow-spotted Bell Frog is captured as student Ben Scheele, left, David Hunter, threatened species officer with the Department of Climate Change and Water, and Michael McFadden, right, observe the frog in the Southern Tablelands of New South Wales state of Australia. The species of frog thought to have been extinct for 30 years has been discovered in rural Australian farmland, officials said Thursday, March 4, 2010.

EDINBURGH, UNITED KINGDOM - FEBRUARY 22: A member of staff at Renewable Devices Swift Turbine, works on a turbine unit on February 22, 2010 in Edinburgh, Scotland. The company manufacture micro wind turbines , which are used by a broad range of customers from domestic clients to large multi nationals. As the UK gears up for one of the most hotly contested general elections in recent history it is expected that that the economy, immigration, the NHS and education are likely to form the basis of many of the debates.

EDINBURGH, UNITED KINGDOM - FEBRUARY 22: A member of staff at Renewable Devices Swift Turbine, works on a turbine units on February 22, 2010 in Edinburgh, Scotland. The company manufacture micro wind turbines , which are used by a broad range of customers from domestic clients to large multi nationals. As the UK gears up for one of the most hotly contested general elections in recent history it is expected that that the economy, immigration, the NHS and education are likely to form the basis of many of the debates.

EDINBURGH, UNITED KINGDOM - FEBRUARY 22: A member of staff at Renewable Devices Swift Turbine, works on a turbine units on February 22, 2010 in Edinburgh, Scotland. The company manufacture micro wind turbines , which are used by a broad range of customers from domestic clients to large multi nationals. As the UK gears up for one of the most hotly contested general elections in recent history it is expected that that the economy, immigration, the NHS and education are likely to form the basis of many of the debates.

EDINBURGH, UNITED KINGDOM - FEBRUARY 22: Members of staff at Renewable Devices Swift Turbine, work on a turbine unit on February 22, 2010 in Edinburgh, Scotland. The company manufacture micro wind turbines , which are used by a broad range of customers from domestic clients to large multi nationals. As the UK gears up for one of the most hotly contested general elections in recent history it is expected that that the economy, immigration, the NHS and education are likely to form the basis of many of the debates.

EDINBURGH, UNITED KINGDOM - FEBRUARY 22: A member of staff at Renewable Devices Swift Turbine, works on a turbine unit on February 22, 2010 in Edinburgh, Scotland. The company manufacture micro wind turbines, which are used by a broad range of customers from domestic clients to large multi nationals. As the UK gears up for one of the most hotly contested general elections in recent history it is expected that that the economy, immigration, the NHS and education are likely to form the basis of many of the debates.

EDINBURGH, UNITED KINGDOM - FEBRUARY 22: A member of staff at Renewable Devices Swift Turbine, works on a turbine unit on February 22, 2010 in Edinburgh, Scotland. The company manufacture micro wind turbines, which are used by a broad range of customers from domestic clients to large multi nationals. As the UK gears up for one of the most hotly contested general elections in recent history it is expected that that the economy, immigration, the NHS and education are likely to form the basis of many of the debates.

Mexican President Felipe Calderon delivers his speech on "Preserving Our Common Heritage: Promoting a Fair Agreement on Climate Change" during a lecture at the United Nations University in Tokyo, Japan, Tuesday, Feb. 2, 2010. Calderon was on a three-day official visit to Japan.

Mexican President Felipe Calderon delivers his speech on "Preserving Our Common Heritage: Promoting a Fair Agreement on Climate Change" during a lecture at the United Nations University in Tokyo, Japan, Tuesday, Feb. 2, 2010. Calderon was on a three-day official visit to Japan.

Mexican President Felipe Calderon delivers his speech on "Preserving Our Common Heritage: Promoting a Fair Agreement on Climate Change" during a lecture at the United Nations University in Tokyo, Japan, Tuesday, Feb. 2, 2010. Calderon was on a three-day official visit to Japan.