… which had their fair share of critics and skeptics - spurred world leaders into action. In 1992, representatives from 178 countries met in Rio de Janierio, Brazil for a summit that led … which had their fair share of critics and skeptics - spurred world leaders into action. In 1992, representatives from 178 countries met in Rio de Janierio, Brazil for a summit that led … which had their fair share of critics and skeptics - spurred world leaders into action. In 1992, representatives from 178 countries met in Rio de Janierio, Brazil for a summit that led …