Being all-electric means it will cause some emissions though, whereas a bicycle doesn't have emit any at all (although you could say it's powered by human-energy which in turn is powered by other things)
http://www.timesonline.co.uk/tol/news/uk/science/article2195...
But it was discussing walking, not riding (far more efficient), and used common milk as the calorie provision (effectively a worst-case scenario).
Please read this. Eating meat is the largest factor for green house gases. So if you want to go Green stop eating meat.