do they think that the problem will just go away if they ignore it?

House GOP energy plan declares that impact of global warming ‘shall not be considered for any purpose.’

House Republicans today introduced their alternative energy plan. Developed by the Republican American Energy Solutions Group, the American Energy Act is billed as an “all of the above” energy program. But as The Wonk Room’s Brad Johnson notes, the legislation looks more like an attempt to legislate the threat of global warming “out of existence.” Indeed, the bill specifically states that at no point in implementing their energy plan can the effects of global warming on the environment “be considered for any purpose”.
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Johnson remarks, “The Republican response to our dependence on fossil fuels and their pollution is to give billions of dollars in new tax breaks and subsidies to the oil, coal, and nuclear industries.”

(Think Progress)
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How insanely dangerous are these kooks?
Of course, this won't pass - because the insane repugs lost in Novemeber, thank goodness - but how can they even propose something so insane?