One more dissenting voice on global warming....

Williams Gray is one of the world's foremost experts on hurricanes.

Hurricane forecaster William Gray said that global ocean currents, not human-produced carbon dioxide, are responsible for global warming, and the Earth may begin to cool on its own in five to 10 years.

Gray, a Colorado State University researcher best known for his annual forecasts of hurricanes along the U.S. Atlantic coast, also said Friday that increasing levels of carbon dioxide in the atmosphere will not produce more or stronger hurricanes.

He said that over the past 40 years the number of major hurricanes making landfall on the U.S. Atlantic coast has declined compared with the previous 40 years, even though carbon dioxide levels have risen.

Gray, speaking to a group of Republican state lawmakers, had harsh words for researchers and politicians who say man-made greenhouse gases are responsible for global warming.

"They're blaming it all on humans, which is crazy," he said. "We're not the cause of it."

Gray complained that politics and research into global warming have created "almost an industry" that has unfairly frightened the public and overwhelmed dissenting voices.

He said research arguing that humans are causing global warming is "mush" based on unreliable computer models that cannot possibly take into account the hundreds of factors that influence the weather.

Gray said ocean circulation patterns are behind a decades-long warming cycle. He has argued previously that the strength of these patterns can affect how much cold water rises to the surface, which in turn affects how warm or cold the atmosphere is.

He also disputed assertions that greenhouse gases could raise global temperatures as much as some scientists predict.

"There's no way that doubling CO2 is going to cause that amount of warming," he said.