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Want to top your pancakes with something other than maple? The alternatives vary, depending on the types of trees in a region. There's Kahiltna birch syrup made in Alaska, blue spruce pine syrup from Utah and Georgian black walnut syrup.

Bananas are the most popular fruit in America, and demand is growing worldwide, too. But growing bananas requires a lot of pesticides. And a new study shows that some of those chemicals are ending up in caimans living downstream from banana plantations in Costa Rica, where many of the bananas that Americans eat are grown.

Urban farmers are eyeing rooftops that are already green as potential sites to grow food. But there are big obstacles to rooftop farming — from permitting to transporting water and soil to the top of a building.

A protest in the Russian Arctic has dramatized growing problems with oil drilling there. Every country has a stake in the enormously lucrative search for oil and gas in the Arctic, says professor Lawton Brigham. But pollution from reckless attempts at development are evident on an island near the Polar circle.

The city of London boasts centuries of architectural history. But a building boom is threatening the city's traditionally low-rise aesthetic and the views of some of that history. Critics — including UNESCO — are very worried about London's changing skyline.

Russia is preparing for the 2014 Winter Games — turning a sleepy valley in the Northern Caucasus Mountains into an Olympic village, with brand-new facilities for every Alpine sport. Officials say it will be a world-class destination for winter-sports enthusiasts long after the Games are over. Environmentalists say it's an ecological disaster in the making.

Tlacoyos are a doughy corn tortilla of sorts that's cooked on a grill. Whether enjoyed on a plastic plate as street food or fine china in a high-end restaurant, it's been a favorite snack for centuries.

Disgusted by reports that members of the Australian Army emailed videos and pictures that degrade women, the service's leader says its time to change. "If you're not up to it, find something else to do with your life," Lt. Gen. David Morrison says.

Just a week after President Obama announced a significant policy shift on immigration, Latino leaders from across the country gathered in Orlando. Both Obama and his GOP rival for the White House, Mitt Romney, addressed the group this week, as NPR's Scott Horlsey reports.

China's ruling Communist Party has announced that disgraced senior politician Bo Xilai has been expelled from the party and faces criminal charges. His fall began when a local police chief told authorities about the murder of a British businessman.