How would one ever sanely respond to “the threat of climate change”? There is NO true science which has gotten far enough to make anything more than WAG’s about how human activity would change the climate, beyond things so egregious that they would fill the sky with light obscuring matter. Study the matter more? Sure, and it can never hurt to learn more and more. But it seems that most grants are purposed at honing a particular political axe.
The unspoken idea is that we’re supposed to accept the liberal theology on global warming, and not ask questions such as you have posed.
So, if you are liberal, you accept global warming without question.
I would like to ask these people questions, such as : hasn’t earth seen warming and cooling cycles throughout time? Haven’t we been in a warming cycle since the end of the last ice age? Chicago was buried under a mile of ice at one time. How did the ice age end, since we know stone age man didn’t have coal fired power plants?