Once a novelty of the Industrial Revolution, bicycles now supply millions of people with efficient, healthy, pollution-free daily transportation. Bicycles can reduce traffic congestion and noise. You can park a dozen bikes in the space of a single automobile, and the idea of a morning commute free of fossil fuels seems particularly attractive fuel costs go up and down.
Even if you only cycle once a week — on Casual Fridays, perhaps — you’ll be reducing your weekly commute’s environmental impact by 20 percent. That’s about the same as trading your current vehicle for a hybrid, and a lot cheaper.