I love travelling by air. It means I can fly over the Atlantic Ocean to New York in only eight hours.
The Solar Impulse plane has just crossed the Atlantic in three days as part of a round-the-world trip. It wasn't as fast as a jet-fuelled crossing. But impressively the 6000 km journey was completely powered by the plane's 17,000 solar cells, which convert light energy into electricity.
Solar Impulse demonstrates just what solar power can be capable of. I hope one day I can rely on clean energy when I fly off on holiday.