Yes, bicycles are quite efficient. Not only compared to cars, but interestingly also to animals. While a normal human is quite bad at converting food into motio

Yes, bicycles are quite efficient. Not only compared to cars, but interestingly also to animals. While a normal human is quite bad at converting food into motion, the system bicycle+human is comparable to some of the most efficient animals. Now, if they had bicycles as well... [Source: Dad, hobby-bicyclist/mechanic]