Cargo ship uses giant kite to propel it across the ocean

Moving gigantic cargo ships across oceans is no small feat, requiring a whole lot of energy to keep those propellers turning and the ships heading on the right course. There is one form of energy that's plentiful out at sea, however: wind. Yep, there's always wind blowing at sea, and now some cargo ships are now harnessing that power to move ships.

Yes, the first trans-Atlantic trip by a cargo ship using kites to help propel it just wrapped up successfully. The giant kite helped save 20% of the ships energy, which will the shipping company up to $2,000 a day in fuel costs once an even bigger kite is hooked up on the next trip. It's such a simple, basic idea, it's a wonder it took this long to happen.

Via Treehugger