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http://www.news.com.au/dailytelegraph/story/0,22049,21636036-5012769,00.html


THE United States' leading hurricane forecaster says global ocean currents, not human-produced carbon dioxide, are responsible for global warming.

William Gray, a Colorado State University researcher, also said the Earth may begin to cool on its own in five to 10 years.

Speaking to a group of Republican MPs, Dr Gray had harsh words for researchers and politicians who said man-made greenhouse gases were responsible for global warming.

"They are blaming it all on humans, which is crazy," he said.

"We're not the cause of it."

Dr Gray said in the past 40 years the number of serious hurricanes making landfall on the US Atlantic coast had declined even though carbon dioxide levels had risen.

He said increasing levels of carbon dioxide would not produce more, or stronger, hurricanes.

Dr Gray, 77, has long criticised the theory that heat-trapping gases generated by human activity are causing the world to warm.

Earlier this month, he dubbed former US vice-president and 2000 Democratic presidential candidate Al Gore "a gross alarmist" for making the Oscar-winning documentary, An Inconvenient Truth, which helped focus media attention on global warming.

Yesterday, Dr Gray said that politics and research into global warming had created "almost an industry" that had frightened the public and overwhelmed dissenting voices.

He said research arguing that humans were causing global warming was "mush" based on unreliable computer models that could not possibly take into account the hundreds of factors that influenced the weather.

He said little-understood ocean currents were behind a decades-long warming cycle, and disputed assertions that greenhouse gases could raise global temperatures as much as some scientists predicted.

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

Dr Gray also said warming and cooling trends could not go on indefinitely and believed temperatures were beginning to level out after a very warm year in 1998.
 

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