Gore Says No Denying Proof Of Global Warming

Al Gore says there's no denying the scientific consensus on global warming.

He has told a forum in Singapore the world's largest carbon polluters are spending ten million dollars a year to manipulate opinion and create the impression of a disagreement in the scientific community on climate change.

After a U.N. science panel report in February that warned the cause of global warming is "very likely" man-made, Gore says "the deniers" offered a $10,000 bounty for published articles disputing the panel's findings.

Gore compares it to the millions spent by U.S. tobacco companies years ago to make people believe there was debate on the harmful effects of smoking.