Hydrogen plane startup ZeroAvia receives backing from Amazon.com Inc and Royal Dutch Shell

On Wednesday, hydrogen plane startup ZeroAvia stated it had secured $21.4 million in a funding round led by Bill Gates’ Breakthrough Energy Ventures to develop zero-emission commercial aircraft. The startup’s prototype hydrogen powered propeller plane has already completed 10 test flights. Its backers includes Amazon and energy giant Royal Dutch Shell. Hydrogen, which produces water…