Doug: "I do have some faith in science. So if the BBC report has scientific evidence that dirty bombs are a dud, then I want to hear it. Most serious scientists believe global warming - or climate change - is for real. What's inconsistent about that?" I am not a scientist, and I don't claim to know if global warming is happening or not. From what I've read about debates between specialists on global warming, the consensus is uncertain, and even those who think it is happening acknowledge that the evidence remains inconclusive. Among scientists as a whole, I suspect that there is more of a consensus that it is happening, but this reflects popular conceptions rather than expert knowledge. The reason why I am inclined to be sceptical of claims about global warming, and why I am inclined to be receptive to this BBC report, is that popular fears in both cases are politically driven, and in both cases the conclusions drawn are backward. Global warming is happening, so stop travelling. And dirty bombs are scary, so let's evacuate NYC and remove any civil liberties that are left to stop the terrorists who might carry them. I think it's inconsistent to go with the flow on global warming - and to endorse the politics of austerity that is popularly bound up with it - while maintaining a sensibly sceptical attitude to dirty bomb fears. James Greenstein