Achim Steiner, executive director of the UN Environmental Program, sees next year's Rio+20 Earth summit as "a world summit on the economy, or a world economic summit," because issues of equity and sustainability are central to the future of the global economy. "We have to make the link between the broader sustainable development agenda, which to some may seem a little bit abstract, and the very real crises of the moment, but also not to simply get stuck in the symptoms," he said.

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