Can flying be made sustainable? Host Tom Standage travels to the year 2042 to find airlines making growing use of “synthetic” aviation fuel, made using carbon dioxide extracted from the atmosphere, which allows for carbon-neutral flights. Back in the present, Nat Keohane, former White House policy adviser, and Catherine Brahic, The Economist’s environment editor, discuss how sustainable fuels and broader carbon markets could help reduce the environmental impact of flying.

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