10 Real-World Ways to Go Green
4: Use pedal power
Burning calories instead of fossil fuel isn't just for San Diego-style climates. Chicago plans to be North America's most bike-friendly city by 2015. To supplement 100 miles of bike lanes and 50 miles of trails, the city built McDonald's Cycle Center in Millennium Park, offering repairs, rentals and bike tours.
Even farther to the north, Minneapolis was named America's No. 2 biking city in 2007 by the U.S. Census Bureau. More than 4,600 adults commute on their bikes. Add recreational riders, and more than 10,000 people regularly pedal through Minneapolis. Plus, the city increased its 123 miles of bikeways by 37 percent in 2010.