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Riding a bike is a great green way to zip from place to place, without contributing to pollution or consuming any fossil fuel, or worrying about parking. Bonus: You get to stay in shape.

Want to make your two-wheeled ride even greener? Try hopping on a secondhand bike, a clever move that will not only save the planet some resources, but is also likely to save you some valuable dough.

If you want to make sure you score a quality bike that's reliable and inexpensive, read on for some of Mother Earth News' great tips on what to for in a secondhand steed: