Denmark levies world's first fat tax

Denmark Saturday became the first country in the world to impose a fat tax after a week in which consumers hoarded butter, pizza, meat and milk to avoid the immediate effects.

New York City saddles up for cycling

Bicycle lanes, cycling lessons for adults, and soon 10,000 bikes in a sharing program: New York is pedaling hard to join the world's growing love affair with the bicycle.

Chemical-munching mussels contaminating Great Lakes

Zebra mussels from the Caspian Sea, introduced to North America by accident, are becoming a veritable plague releasing toxic chemicals into the Great Lakes, Canadian biologists say.

GE, Nissan join hands on electric cars

General Electric and Nissan, maker of the all-electric Nissan Leaf, said Friday they will team up over the next two years to explore ways to promote the use of electric vehicles.