The world's greenest mode of transportation

This bike: photosynthesis bike. It has long been common knowledge that bicycles can reduce the number of cars on the road, reducing traffic, and thus reducing pollution, but to my knowledge I've never seen a bike that proactively benefits the environment. I'm not overly green or a tree hugger by any means, but this concept is pretty cool and makes me wonder, "could a car do this too?" The design doesn't show any details whatsoever about how it would work, but I'm interested to see how it develops.