The debate over global warming (Score 1)

Michael posted an interesting comment about an article in the Daily Telegraph, which apparently shows that the world was a lot hotter in the middle ages than at present. Before accepting this claim without question, I would urge readers to: (a) read the source document ("about to be published in the journal Energy and Environment") and (b) read some of the literature which provides background material for the belief that global warming is happening now. As a start, take a look at the most recent report on the science by the Intergovernmental Panel on Climate Change (IPCC) at: http://www.grida.no/climate/ipcc_tar/wg1/index.htm (start with the "Summary for Policymakers"), and have a look at some of the reasons why we should be skeptical of much of the "anti-greenhouse" propaganda at: http://www.trump.net.au/~greenhou/