Friday saw the end of the Rio+20 conference and, rather appropriately, outside it was wet and rainy. During my time in Rio it has been uncharacteristically wet and stormy, a subtle indication of the shifting seasons and weather patterns that this conference was meant to address. On Thursday I had access to the plenary hall, a vast cavernous space in semi-darkness with row upon row of desks and laptops, where delegates and leaders were...
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