IPCC – Fourth Assessment Report (AR4) 1 January 2010
The core group of people that are looking into the climate change problem are the Intergovernmental Panel on Climate Change (IPCC). You can see their latest findings at the IPCC website. Their Fourth Assessment Report (AR4) was published in 2007. This is the consensus of all of the world’s leading climate scientists. Its findings are quite worrying, especially how much change has accelerated more than they predicted in the previous report. However, they do make clear that we can make a difference (i.e. mitigate the problem) if we act now. There is a lot of information on their website, you will probably want to start by reading the Summary for Policymakers documents in AR4, starting with “The Physical Science Basis”.