At the close of the 38th session of International Civil Aviation Organization (ICAO) on Friday the ICAO States committed the organisation to develop a global market-based measure (MBM) to limit the growth of international aviation emissions. The key paragraph is 5 on page 13: “Resolves that States and relevant organizations will work through ICAO to achieve a global annual average fuel efficiency improvement of 2 per cent until 2020 and an aspirational global fuel efficiency improvement rate of 2 per cent per annum from 2021 to 2050, calculated on the basis of volume of fuel used per revenue tonne kilometre performed”. This commitment is purely aspirational and voluntary Paragraph 5…