"I always have problems when people come up and say the science is settled," said Santorum, a Republican presidential candidate and winner of the 2012 Iowa caucuses. "That's what they said about the world being flat. When someone says the science is settled you're not a scientist, because scientists never say the science is settled." He added: "The idea that the science is settled, to me, tells me that this is political science, not real science."
'But the distinction between the pope’s moral authority and mere political opinion will get harder to draw this summer when Francis’ forthcoming encyclical is expected to make environmental protection and shielding the poor from the effects of climate change a matter of church doctrine.'
Jeb Now: 'Look, first of all, the climate is changing. I don’t think the science is clear what percentage is man-made and what percentage is natural. It’s convoluted. And for the people to say the science is decided on, this is just really arrogant, to be honest with you.'
'I think global warming is real. I don’t think that’s deniable. And I do think human activity contributes to it.'
The U.S. 'can’t be acting unilaterally' especially 'when folks in China are doing things to the environment that we would never be done in our country …There’s no use in denying global warming exists. The question is what we do to deal with it.' Christie also expressed skepticism about cap and trade programs.