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Rio summit: Little progress, 20 years on

On the final day of the UN sustainable development summit in Rio, UN chief Ban Ki-moon has urged governments to eliminate hunger from the world.

The secretary-general said in a world of plenty, no-one should go hungry.

The final phase of the summit has seen pledges from countries and companies on issues such as clean energy.

But a number of veteran politicians have joined environment groups in saying the summit declaration was “a failure of leadership”.