Via the Scientific American Blog:
Scientific evidence demonstrates clearly that human activity is changing the planet's climate. But there are still sceptics who dispute the data and its interpretation. If you don't believe the science, please tell us why and we'll respond to your challenge.
Alan Thorpe of the Natural Environment Research Council and a team of scientists are taking on all comers until January 31. Please do not post questions below as I will not relay them elsewhere for you. Please post questions on the linked debate site. You are welcome to link and repost below after doing so. I will try to provide follow up answers from the debate on your question (or similar).



