The long flight towards clean aviation

摘要

The Paris climate summit in November 2015 was a great diplomatic success but aviation, like shipping, was not included in the final agreement. International air transport currently represents about 1.5% of all man-made emissions, though with a projected doubling of demand for air travel over the next 10-20 years, up from approximately 3.5 billion in 2015, action had to be taken.