Didn't your mother teach you how to share? If so, you might already have the key to having some wheels without the aggravation of actually owning a car.
While car sharing services have been around in the U.S. since the late 1990s, they've only lately began to really catch on. Today, Massachusetts-based Zipcar is the world's largest car sharing company, with its 605,000 members in the U.S., Canada and the United Kingdom sharing 9,000 cars.
There are dozens of car sharing programs around the U.S., but Zipcar controls the market and has helped advance to concept of car sharing as a convenient way to drive, save money and be green.