I have specific thoughts on what they said that I am surprised George Monbiot dosent address in his Guardian article. The central tennant of the show was why after the war did we have a great increase in CO2 emmissions but a cooling to the 60s. Two things immediatly jump to mind. 1 Global dimming. This is a vital aspect that we are only now starting to factor and this is the effects of the soot and dust particles we produce. These have a very powerful cooling effect. With the introduction of clean air acts in the 60s the amount of soot and smog that the west produced dropped away. After this we had marked warming. Another factor is that there was an agreed reduction in Solar activity 1940-60 that would have also cooled the earth. But since the 60s the Sun activty has not markedly increased but tempreture has.