To visit Copenhagen is to see bicycle commuting taken to an entirely new level, at least by standards in the United States.

The residents of Copenhagen bike 1.2 million kilometers every weekday - that's 40 times around the globe. The climate benefits are obvious, but to the Danes, that's almost secondary. City planners have spent nearly a decade transforming the city, putting in bike lanes, connecting major routes, slowing traffic, adding ramps to stairs. The result is that the majority of people who bike in Copenhagen - and 37 percent of all the people entering Copenhagen during the week do so on bike -  are on two wheels because they find it easy.

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