Global warming and the economic effect

The doomsday scenario for global warming is as chilling as ever, but in the shadow of economic meltdown there are fears that Rio+20 will just be a talking shop.

Twenty years ago this weekend, the biggest meeting of world leaders ever seen was taking place. More than 160 presidents and prime ministers, including George H Bush, John Major, François Mitterrand and Helmut Kohl were meeting to discuss climate change at what was billed, grandly, as “the Earth Summit”.

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