Efficiency

farmer on bicycle
Indonesian farmer on a bicycle
Photo by CEphoto, Uwe Aranas

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, the bicycle uses two percent as much energy as a car.

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