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Presidential hopeful Jeb Bush railed against those who say there is a consensus on the human causes of climate change Wednesday night, calling that idea “intellectual arrogance.” “I don’t think the science is clear of what percentage is manmade and what percentage is natural. It’s convoluted,” he said at a New Hampshire campaign event. “For the people to say the science is decided on this is really arrogant, to be honest with you.” The Democratic National Committee swiftly issued a statement saying that 97 percent of scientists agree that human activity affects climate change.