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One of the biggest weaknesses of today's battery technologies are their power-to-weight ratio. If you want to go fast or far, you need to carry a lot of heavy batteries with you. But a team of scientists from MIT have made a discovery that could signal the beginning of an entirely new age of energy storage technology. We want to say just one word to you... just one word. Are you listening? Nanotubes.

Nanotechnology isn't new to the green car discussion. After all, we've heard about the potential for nano lubricants and Ford's work researching nanotechnology for developing "paints, plastics, light metals and catalysts that will allow reduced vehicle weight and improved fuel economy." There's even a car called the Nano and a company called Altair Nanotechnologies that makes batteries, but those are different stories altogether.