repugs don't believe in science

Poll: 74 percent of GOP lawmakers don’t believe in manmade global warming.

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Some of their explanations concluded, “Human contribution is minimal,” and “It’s been proven beyond a reasonable doubt that Democrats are OK with the idea of surrendering our spot atop the world economy.”
(Think Progress)
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What reality do these people live in?
And what is up with that bizarre non-sequitor about the Democrats? Even if such slander was true, what does that have to do with the scientific evidence for global warming?