BBC: The Intergovernmental Panel on Climate Change (IPCC) has warned against drawing too many conclusions from the latest leaked version of its upcoming, and eagerly awaited, Assessment Report 5 (AR5).
This massive tome will be published in four stages over the next year - the first part, the physical science behind climate change, will be presented in Stockholm on 26 September.
The process of compiling this report - with several hundred scientists, 195 governments and over 100 non-governmental...