Plenty of people--including us--will gladly tell you to get out of your car, and get on a bike: You'll winnow your carbon footprint to a baby step; you'll get outside and get a workout in the bargain. So let's say you do. What now? A street full of whizzing cars isn't the cul de sac where you first rode without training wheels. You can't ride with the same carefree attitude.
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