As I'm sure many of you are now aware, a NAS committee submitted its assessment on Climate Reconstruction models, as requested by Congress. It's mostly good news for the scientific community, in that it validates the overwhelming concensus of their findings, but it could still be used to politically, imo.

Based on the report, the committee concluded with "high confidence" that the "hockey stick" model, as first proposed by Michael Mann ('98) and subsequently validated by other climatology researchers, accurately depicts global warming and climate trends that has occurred over the past few decades. Generally, these studies do support evidence that "human activities are responsible for much of the recent warming". And specifically, it's been the fossil fuel emissions of CO2 and methane (CH4) into the atmosphere that have contributed to the highest global mean surface temperatures (ie global warming) ever recorded over the last 400 years. Of note, 2005 was the hottest year on record.