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Bill Nye the Science Guy said now was not the time to deny that there is climate change in a debate Sunday with U.S. Rep. Marsha Blackburn, who said there was no consensus on the issue among those in the scientific community.

The pair were brought together on NBC's "Meet the Press" with David Gregory, who posed whether there was a need for urgency on the part of the U.S. to contend with what's being called "extreme weather." The discussion was preceded by a montage of weather phenomena from floods to snow storms that has gripped the nation.

"You don't have to have a Ph. D to see what's going on," Nye said, clashing with the Republican from Brentwood, who is also the vice chairman of the House Energy and Commerce committee, a panel in charge of producing and overseeing energy and climate regulations.

She repeatedly pointed to a need to examine the cost-benefit analysis of producing new laws, and at one point said that Nye is an engineer and an entertainer, and she a member of congress, not climate scientists, among whom there is still skepticism about what is driving the weather conditions.

"What we need to be looking at is the way to achieve efficiencies," she said.

Nevertheless, Nye, who recently debated evolution with creationism proponent Ken Ham, said big government has somehow been tied to climate change.

"I want the U.S. to lead the world on this," Nye said. "The more we mess around with denial the worse it gets."

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