translate English to French: The scheme would operate as a unidirectional open system – which means that aircraft operators could purchase credits from other industries (but other industries could not purchase credits from aircraft operators). To a limited extent, the purchasing of credits from projects directed to CO2 emission reduction could be permitted, under what are known as the flexible mechanisms of the Kyoto Protocol.
On estime que dès 2020, la réduction de CO2 dans l’atmosphère pourrait ainsi atteindre 46 %, ce qui représenterait 183 millions de tonnes de CO2 de moins.