Governments around the world are failing in their commitments to address climate change, a group of international science institutions warn in a new report, saying the window to prevent catastrophic warming will soon close.

"The world is engaged in an unrecognized, massive gamble with the future of the planet," economist and author Jeffrey Sachs warned at a news conference discussing the report, "Deep Decarbonization Pathways."

Produced by 30 scientific institutions from the 15 countries that emit the most greenhouse gases, the report was presented to United Nations Secretary-General Ban Ki-moon Tuesday morning.

Sachs, who directs Columbia University's Earth Institute in New York, said a full report will be released next spring, but the contributors felt it was important to release the