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Study sees climate upside in greening arid regions An upside to climate change? The issue has been blamed for many problems, including more acidic oceans and rising pollen counts, but a study released Friday suggests a benefit: Arid regions are getting greener. Satellite data since the early 1980s have shown a flourishing of foliage worldwide, and scientists have suspected this change may be due partly to the increase in atmospheric carbon dioxide, a heat-trapping greenhouse gas emitted by the burning of fossil fuels. Turns out, they were right because of CO2′s « fertilization effect, » according to a team of scientists led by Randall Donohue of the Commonwealth Scientific and Industrial Research Organization in Canberra, Australia. Their mathematical model predicted a foliage increase of 5% to 10%, based on the 14% hike in atmospheric CO2 from 1982 to 2010, for the regions they studied: the southwestern corner of North America, Australia’s outback, the Middle East and some parts of Africa. What actually happened? Satellites showed an 11% increase in foliage after adjusting data for precipitation. |
Au début, on nous disait que le CO2 allait augmenter la désertification. Aujourd’hui, on nous dit que le CO2 fera verdir les déserts…
Quel était le slogan des réchauffistes déjà… « The science is settled, the debate is over »…
Ce n’est pas pour rien qu’on augmente la quantité de CO2 dans l’air des serres commerciales —> Ça augmente la productivité
Et aujourdhui on nous met ca sur les primes news sur le site de yahoo
http://ca.news.yahoo.com/global-carbon-emissions-hit-record-high-2012-135456456.html
en lisant larticle cest encore deux discours different encore une fois……