Matt Ridley lecture for the Royal Society of London. Topic “Global Lukewarming”. Ridley admits btw that he has financial interests in coal. Ridley admits that global warming is a fact but challenges that catastrophic significance of the phenomenon. Claims that simulation models exaggerate global warming and that there was merely 0.5 degree Celsius global warming in half a century and that real catastrophic climate change is at least a century from now.
Interesting is the remark that the correlation between the level of CO2 and corresponding global warming is of a logarithmic nature and per definition can’t cause severe global warming and that in order for 1 degree Celsius increase to materialize, you need a doubling of the CO2 level, implying that the worst temperature increase is already behind us.
Ridley begins his talk by remarking that there is a huge advantage to increased CO2 levels, namely the greening of the earth as extra CO2 functions as a fertilizer.
Ridley does acknowledge that real environmental problems do exist: over-fishing, ocean acidification, hunting, deforestation.
[nasa.gov] – Carbon Dioxide Fertilization Greening Earth, Study Finds