Researchers at MIT, led by Dr Mark Drela and tasked by NASA, have come up with a double-wide design: instead of the traditional single cylindrical body, two partial cylinders are joined together with three engines at the back of the plane between the double tail.

BBC: The futurist: Will green aeroplanes take off?

Design teams work directly with clothing manufacturers to create private-label lines, avoiding the mark-up applied by apparel companies which normally serve as middlemen between retailers and manufacturers.

ECONOMIST: Retailing