NPR News

Interest in natural gas vehicles soared in the 1990s and then faded. Twenty years later, the cost of gasoline is going up while the cost of natural gas is going down. And that difference in price explains the resurgent interest in natural gas vehicles.

In Indiana, Fair Oaks Dairy Farm does more than just produce milk — it is also in the transportation business. The farm owns 60 trucks, which deliver milk to a processor halfway across the state. Last September, most of the trucks were converted to natural gas.

David Greene talks to materials chemist Donald Sadoway from the TED (Technology, Entertainment and Design) conference in Long Beach, Calif. Sadoway is the co-inventor of the liquid metal battery. It's inexpensive, super efficient, sustainable and can provide large scale energy storage.

Greece has taken almost all the action needed to secure a second bailout from eurozone countries, according to the head of the European currency group. The first loan can now be paid out by March 20, as long as Greece completes a bond swap between Athens and private investors, which should cut the nations privately-held debt in half.

The district of Baba Amr in the city of Homs had been the heart of the Syrian uprising, where mass protests turned into an armed resistance. Activists say government troops are combing the area, arresting any male over the age of 12.