Agence France-Presse: Twenty years ago, a burst of sunny optimism radiated from Rio de Janeiro as world leaders staged a meeting that would prove pivotal.
Amid post-Cold War euphoria and a desire to tackle the problems of the looming millennium, the UN’s 1992 Earth Summit inscribed protection of the planet on the world’s priority list. It set down a blueprint, Agenda 21, for sustaining nature rather than destroying it, and created UN mechanisms designed to brake the oncoming juggernauts of climate change, desertification…

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