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>> bill nye did it again. on sunday republican congresswoman marcia blackburn took on bill nye the science guy for a so-called debate on climate change. >> well, i think that what you have to do is look at what that warming is. and when you look at the fact that we have gone from 320 parts per million, 0.032 to 0.040, 400 parts per million, what you do is realize its very slight. now, there is not consensus. >> once again, the congresswoman is trying to introduce doubt. doubt in the whole idea o...

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Many of the policies put forward to address the problem will lead to unacceptable levels of economic hardship. the fix can be very expensive in the short term for long-term gain." >> what you have to do is look at what that warming is. and when you look at the fact that we have gone from from 320 0.040, 400 parts per million, what you do is realize its very slight. now, there is not consensus, and you can look at the latest ipcc report and look at dr. lindzen from m.i.t. his rejection of that. o...

Warming is. and when you look at the fact that we have gone from 320 parts per million, 0.032 to 0.040, 400 parts per million, what you do is realize its very slight. now, there is not consensus, and you can look at the latest ipcc report and look at dr. lindzen from m.i.t. his rejection of that or judith curry who recently from georgia tech. there is not consensus there. i think what we have to do -- >> hold on. i just have to interrupt you. let me interrupt you because its not -- you can pick ...