It doesn’t do most people any good to question the assertions of the acolytes of the First Church of Global Warming. Except, uh, when you’re a famous physicist named Freeman Dyson:
"The change that’s now going on is very strongly concentrated in the Arctic. In fact in three respects, it’s not global, which I think is very important. First of all, it is mainly in the Arctic. Secondly, it’s mainly in the winter rather than summer. And thirdly, it’s mainly in the night rather than at the daytime. In all three respects, the warming is happening where it is cold, not where it is hot."
You’re still mocked and shouted down, of course. But, uh, you know, you don’t care. Good thing heretics are no longer burned. Yet.
THE TEXAS SCRIBBLER 
They wouldn’t burn the heretics – for fear of exacerbating the GW, you know. Beating them on the head with recyclable materials, though, could be considered 😉
Well, the zealots, like NASA’s James Hansen who has said that deniers belong in jail, might come up with a special crematorium for just such cases.