This new report from the National Academies' National Research Council was produced in response to a request from the Bush administration. Written by a distinguished committee, the report attempts to summarize our current understanding of global climate change and examine what the future may hold for the 21st century and the extent to which warming may be attributable to human activity. Among other things, the report argues for a great deal more systematic research to address current uncertainties in climate-change science. Users may read the full text of the report in Open Book format at the National Academy Press site.