Bikes Of May

Spokes-person
Peter Reich, designer of the Brooklyn Swift Folding Bike, demonstrates the engineering behind his design. Because bicycles are often banned in office buildings and restaurants, such fold-up models have become increasingly popular among urban commuters, especially as gas and transportation costs have continued to rise. According to the League of American Bicyclists, nearly 57 million Americans own bikes.

• How to Win the War on Global Warming