Paul Krugman in today's Times:

"Finally, terrorism is just one of many dangers in the world, and shouldn’t be allowed to divert our attention from other issues. Sorry, conservatives: when President Obama describes climate change as the greatest threat we face, he’s exactly right. Terrorism can’t and won’t destroy our civilization, but global warming could and might."

Read the article here.

Yes, probably global warming is the biggest terrorist of all. But let's not start a war against global warming. Our track record isn't too good.