9: Operational efficiencies

Flight paths haven’t been fundamentally revamped since the 1950s, and there is a plan to overhaul them, along with other efficiency savings such as optimising trajectories and continuous descents, enabling planes to stay higher closer to airports, reducing holding in circular queuing to land, and planes only using one engine to taxi around runways.

The industry uses phrases like ‘radically reducing carbon emissions’ and Grant Shapps suggested carbon reductions of ‘up to 20%’ ( https://www.telegraph.co.uk/news/2020/01/25/flight-paths-redrawn-first-time-60-years-cut-air-congestion/). This increased efficiency will make some emission savings, but probably less than 5% at most. And unless there is carbon regulation, these savings will be cancelled out by increased passenger numbers due to lower pricing.