The answer to today's Geo Quiz is Tempelhof Airport. The World's David Leveille reports that Berlin's city officials want to close the airport down. But supporters say it should stay open, in honor of its role during the historic Berlin Airport in 1948 and 1949.
Curitiba, Brazil's model sustainable city, was largely the brainchild of Jaime Lerner. As three-time mayor of the city, he created a rapid transit bus system, increased the amount of green space, and encouraged children and adults alike to recycle. Jaime Lerner joins host Steve Curwood and says all cities have the potential for environmental success.
Mouna Andraos is an artist and web designer who's always been fascinated by street vendors since her childhood in Lebanon. She created a working portable generator that uses a crank and a solar cell to charge cell phones and laptops, and even run small appliances. Ada Lee Halofsky hit the New York City streets with Andraos to see Power Cart in action.
The New York subway system has one of the best environmental designs of recent years: Coney Island's Stillwell Avenue terminal, one block from the Atlantic Ocean, is topped by a state-of-the-art photovoltaic glass roof. Kurt checked it out with architect Greg Kiss.
Peru recently imposed a nationwide teachers test in an effort to improve the country's education system, but unfortunately, more than 90-percent of the teachers failed the exam, as The BBC's Dan Collyns reports from Lima.