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Last Updated: Saturday May 02 2009 11:02 GMT

Students design bike powered by air!

You've probably heard lots about environmentally-friendly electric cars, but what about a motorbike that runs on air?

It may sound too good to be true, but a group of students in India say they've done just that.

The bike uses compressed air for fuel so it doesn't release harmful fumes into the atmosphere.

But it's not great if you're in a hurry - its top speed is just 11 miles per hour.