Rough Guides Ltd. (travel book series)
San Francisco Exploratorium
Environmental Law Institute
US Climate Change Science Program (Interagency)
The coordinating point for all federal agencies working on climate science, the CCSP reports to the White House Council on Environmental Quality and Office of Science and Technology Policy via NOAA and the Commerce Department.
Some beginners' guides to climate science
How can you tell whether global warming is happening if the White House shuts down the satellites needed to sense it by cutting their budgets?
How did the White House suppress an EPA finding that human-induced greenhouse warming was a threat to human health (and thus subject to regulation)? By refusing to read it. But you can read it here.
Intergovernmental Panel on Climate Change (Working Group 1)
Some authoritative summaries of scientific understanding of basic climate processes.
A layperson's explanation of many of the key concepts and findings in the 2001 IPCC report. Written and produced by the Environmental Law Institute and the Environmental Health Center with funding from the Energy Dept's research office.