Bush adviser: Humans caused climate change

London -- John Marburger, one of U.S. President George Bush's scientific advisers, said climate change is real and was likely caused by humanity.

The presidential science adviser said that he was more than 90 percent certain that the current state of climate change was the direct result of greenhouse gas emissions caused by humans, the BBC reported Friday.

The Office of Science and Technology Policy director also said that without significant cuts in the output of carbon dioxide worldwide, the Earth may one day become "unlivable."

"The CO2 accumulates in the atmosphere and there's no end point, it just gets hotter and hotter, and so at some point it becomes unlivable," Marburger said.
Marburger's comments support a recent review from the Intergovernmental Panel on Climate Change of the status of Earth's climate.

The BBC said Marburger's alarming comments come as a series of significant meetings regarding climate change are set to take place in Washington and at the United Nations.

--
Copyright 2007 by United Press International.