Better city bike maps are made by volunteers

Not all bike routes are equal. Some places that are marked as bike routes on a map feel precarious when traversed on two wheels, including shoulders covered in debris and places where you can feel the wind from speeding cars.

Free wheelin' in New York: the Big Apple bike boom

Expanding bike lanes, handing out free helmets and making lessons free: New York is making great strides in encouraging pedal power at the expense of exhaust fumes, even if some cyclists are still nervous about navigating ...

Transit-oriented development helps cities ease off the gas

Like a teenager lobbying for the car keys, Phoenix came of age in the era of the automobile. The area's explosive growth in the mid-20th century reflected America's similarly growing love affair with cars.

Beijing to get rid of 1,200 polluting enterprises

Authorities in Beijing said Wednesday they plan to get rid of 1,200 high-polluting enterprises by 2015 to improve air quality in the Chinese capital, one of the world's most polluted cities.

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