Warming 'Likely' Man-Made, Unstoppable - The world's leading climate scientists said global warming has begun, is "very likely" caused by man, and will be unstoppable for centuries, according to a report obtained Friday by The Associated Press. The scientists _ using their strongest language yet on the issue _ said now that the world has begun to warm, hotter temperatures and rises in sea level "would continue for centuries," no matter how much humans control their pollution. The report also linked the warming to the recent increase in stronger hurricanes. "The observed widespread warming of the atmosphere and ocean, together with ice-mass loss, support the conclusion that it is extremely unlikely that global climate change of the past 50 years can be explained without external forcing, and very likely that is not due to known natural causes alone," said the report by the Intergovernmental Panel on Climate Change _ a group of hundreds of scientists and representatives of 113 governments. The phrase "very likely" translates to a more than 90 percent certainty that global warming is caused by man's burning of fossil fuels.