Vårt globala ekologiska fotavtryck motsvarar nu 1,4 jordklot, enligt Living Planet:
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Därför behövs det nog fler rapporter av den typ som Världsbankens förre chefekonom Nicholas Stern igår överlämnade till brittiska regeringen. Här har klimatförändringen räknats om i ekonomiska risker och kostnader, resonemang som kanske går bättre hem hos finansdepartement, investerare och försäkringskontor världen runt.
Ett sammanfattande citat ur rapporten, det här är miljö för ekonomer:
Using the results from formal economic models, the Review estimates that if we don’t act, the overall costs and risks of climate change will be equivalent to losing at least 5% of global GDP each year, now and forever. If a wider range of risks and impacts is taken into account, the estimates of damage could rise to 20% of GDP or more.
In contrast, the costs of action — reducing greenhouse gas emissions to avoid the worst impacts of climate change — can be limited to around 1% of global GDP each year.
[…]
The transition to a low-carbon economy will bring challenges for competitiveness but also opportunities for growth. … Markets for low-carbon energy products are likely to be worth at least $500bn per year by 2050, and perhaps much more. … [F]rom implementing strong mitigation policies this year, shifting the world onto the better path: the net benefits would be of the order of $2.5 trillion. This figure will increase over time. This is not an estimate of net benefits occurring in this year, but a measure of the benefits that could flow from actions taken this year; many of the costs and benefits would be in the medium to long term.
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