From my friend Jeff:
"The next word, but not the last word, in our little ongoing feud about climate change comes from Freeman Dyson: http://www.edge.org/documents/archive/edge219.html#dysonf"
I don't agree with all his points, but he does set a good example by asking all scientists to remain skeptical and avoid politics. Unfortunately, he doesn't do himself any favors by repeatedly calling himself a "heretic," which makes it sound like he's looking to be a martyr.
With apologies to Sir Donald Wolfit: Dying is easy. Science is hard.