“We must unite in a world war effort to half further temperature rises.” An advance copy of the statement said. “Climate change is happening and it threatens the rights and security of everyone on Earth. With less than one degree of global warming, the glaciers are melting, the ice sheets collapsing and lowlying areas are in danger of being swamped.” World leaders will meet in Copenhagen to hammer out a successor agreement to the 1997 Kyoto Protocol.