Solar airplanes are not thing of the future anymore, but as you know, they aren't as fast as the standard airplanes that we use every day. Therefore EADS have proposed a new airplane called Zero Emission Hypersonic Transportation (ZEHST).

ZEHST might change the air traffic forever, mostly because it allows us to travel a lot faster than before. For example, you'll be able to travel from New York to London in just one hour, and that is amazingly fast compared to the fastest commercial planes today. This airplane will be able to achieve 3,125 mph, and the best thing about it is that it runs on biofuel made out of seaweed.

Sadly, ZEHST is just a concept for now, and it will take about 40 years before we see ZEHST in action. So far, we'll just have to rely on other types of eco-friendly aircrafts, such as solar airplanes.

[via Dvice]