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Raise Ambition to Reduce International Aviation and Maritime Emissions


Emissions from the international aviation and maritime sectors should be reduced in line with a 2°C pathway through action under the International Civil Aviation Organization (ICAO) to implement a market-based measure and aircraft efficiency standard, and through strong shipping fuel efficiency standards under the International Maritime Organization (IMO).

Global aviation and shipping together produced about 5% of global CO2 emissions, and by 2050 this is expected to rise to 10–32%. Yet they offer some of the most cost-effective emission reductions available today, particularly through improved fuel efficiency. Two new IMO standards are expected to save an average of US$200 billion in annual fuel costs by 2030. Adoption by the ICAO in 2016 of a market-based measure (an emissions trading or offset scheme) can both cut emissions and potentially generate finance for climate action or other purposes. This should be complemented by a new aircraft standard to ensure emissions reductions within the sector. The IMO should adopt a global emissions reduction target and promote fuel saving through strong operational efficiency standards and a supporting data-sharing system. These measures could help reduce annual GHG emissions by 0.6–0.9 Gt CO2e by 2030. [...]

The New Climate Economy

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