Belfer Center, Kennedy School, Harvard Univ. /by Christian De Perthuis and Pierre-André Jouvet
The multinational framework has already shown itself capable of dealing with global environmental threats. The Montreal Protocol, signed in 1987, led the international community to virtually stop emitting CFC gases1, the build-up of which in the atmosphere was causing the destruction of the ozone layer. The success of this agreement with universal reach was based on three pillars: strong political commitment by the governments concerned, a rigorous and independent monitoring system, and appropriate economic instruments. More than twenty years of climate negotiations have so far failed to yield comparable results. Is what was possible for ozone in the troposphere unattainable for greenhouse gases?