A bicycle is the most efficient machine in terms of energy expended for moving weight over distance.
A human on a bicycle is also the most efficient animal on earth in terms of energy spent for travel.
Bicycling is six times more efficient than walking.
Using a bicycle, it takes 35 calories to move an average-size person one mile (1.6 km). It takes 1,860 calories to move a person a mile in a car. So, taking a bike uses two percent as much energy as a car.
The average bicycle costs three percent as much as a typical car.
People who commute on bicycles have a 39% lower death rate than people who do not ride their bikes to work.
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According to at least one statistical study, the health benefits of cycling outweigh the risks by twenty to one.
