The future of flying will be organically grown, with seats made from plants and fuel made from oils from seeds or algae. There will be "no more non-renewable materials, like metal or plastic" in the cabin of tomorrow's aircraft. Flying will be the answer to scarce resources on the ground; by travelling through the air rather than by road or rail, the ground can be "left for farming and preserving biodiversity". Meanwhile, in cities "vertical take-off will be a way of saving space".
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