Increasingly powerful "supertyphoons" will strike Japan if global warming continues to affect weather patterns in the western Pacific Ocean, scientists say. Supercomputer simulations show there will be more typhoons with winds of 179 miles (288 kilometers) per hour—considered an F3 on the five-level Fujita Scale—by 2074. By definition, supertyphoons carry winds of at least 150 miles (241 kilometers) per hour. Such storms would be more destructive than Hurricane Katrina, which slammed into U.S. (source: news.nationalgeographic.com)
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