Many people use them interchangeably, but they mean subtly different things - yet when it comes to influencing public opinion, scientists should perhaps use the less-accurate one.
While there are benefits to higher global temperatures, they are vastly outweighed by the costs to human life.
New standard to certify organisations' efforts at lowering emissions.
There is a danger of a permanent gap opening up between climate scientists and the general public.
Lib Dem leader Nick Clegg warns Gordon Brown not to go ahead with a new generation of coal power pla
Mark Lynas responds to a controversial article on newstatesman.com which argued global warming has s
Peter Hardstaff reports on the anger felt at the Bali climate conference over the US stance on cutti
Should the incremental approach of Kyoto be extended, or ditched for something more ambitious? Read