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Sports cars aren't supposed to be green . They're supposed to snort petrol, belch fire and cause innocent passers by to develop nasty chest infections. So when Lotus rolled up to the British International Motor Show in an a solar-powered Eco Elise made out of plants, it raised more than a few eyebrows.

See those brown bits on the car? That's foliage, that is. And not just any foliage -- it's pressed hemp. Yes, hemp -- what you make cannabis from. We've no idea if this car's designers had ingested some kind of 'hemp' when they came up with the concept of a car made of ganja, but on closer inspection it's actually not a bad idea.

Hemp is a renewable, lightweight material that absorbs CO2 through photosynthesis, which is good for the planet. The particular brand of hemp used is ethically... // Crave