OP-ED CONTRIBUTOR The Future We Want By BAN KI-MOON Published: May 23, 2012

Twenty years ago, there was the Earth Summit. Gathering in Rio de Janiero, world leaders agreed on an ambitious blueprint for a more secure future. They sought to balance the imperatives of robust economic growth and the needs of a growing population against the ecological necessity to conserve our planet’s most precious resources — land, air and water. And they agreed that the only way to do this was to break with the old economic model and invent a new one. They called it sustainable development.

Two decades later […]