One line rebuttals with links to the relevant science.

I especially like these [and my comments]:
"It's too hard."
"It's not us." [It's never us--always them.]
"Humans are too insignificant to affect global climate" [but not too insignificant to be considered the center of Creation]
"Hockey stick is broken" [yeah, more like exponential curve]
"It's the sun" [well, what isn't? It's what's happening here that matters.]