Demonstrators wearing masks representing German Chancellor Angela Merkel, (L) French President Nicolas Sarkozy, (2nd L) British Prime Minister Gordon Brown (2nd R) and US President Barack Obama, (R) campaign for a climate deal to be reached in December's Copenhagen climate summit, during a protest outside the Houses of Parliament, in London, on November 4, 2009. Getty Images logo Getty Images 1 month ago

Demonstrators wearing masks representing German Chancellor Angela Merkel, (L) French President Nicolas Sarkozy, (2nd L) British Prime Minister Gordon Brown (2nd R) and US President Barack Obama, (R) campaign for a climate deal to be reached in December's Copenhagen climate summit, during a protest outside the Houses of Parliament, in London, on November 4, 2009.