The following site is quite interesting

http://www.esrl.noaa.gov/gmd/aggi/

Table 2 and Fig 2 suggest to me that time and money would be best spent
on finding ways of coping with the inevitable climate changes rather
than pussy-footing around trying (unsuccessfully?) to find ways of
reducing the growth in emissions by a few percent. But I suppose that
drawing up a plan for the evacuation of Central London within the next
50-100 years is not exactly a short-term vote winner :-)

Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England