segunda-feira, novembro 22, 2004

Ainda o aquecimento global

Telegraph | Opinion | Global warming can be bad or good news  it depends on what you want to see

Trecho:

The Intergovernmental Panel on Climate Change, whose work underpins the Kyoto accord, projects various "scenarios", but the assumptions do not stand up to rigorous scientific analysis, and the extreme projections, the ones that make the best headlines, are well into the world of fantasy. Besides, would it be such bad news if the Arctic ice cap retreats? The answer's obvious if you're a polar bear, but much less so if you're a commercial fisherman, although almost as important. Ragnar Arnason, an economist at the University of Iceland, admits that the net impact is hard to judge, but concludes that it would help the commercially valuable species such as herring and cod. For the north Atlantic, at least, "global warming appears to be good news rather than bad".

The net effect of global warming is impossible to calculate, either in magnitude or direction, which is why America sensibly refuses to sign the Kyoto accord, and the Russians have done so against the strong recommendation of President Putin's chief economic adviser. Meeting the demands for lower CO2 emissions is going to be a material brake on economic growth, and is unlikely to have any noticeable impact on the world's climate. It is, in short, a waste of money. A project to bring clean water to everyone in Africa would do far more to increase the sum of human happiness than anything flowing from Kyoto, and could be done for a fraction of the price.