FILE - In this Thursday, May 28, 2009, file photo a 2010 Ford Transit Connect sits near Grand Central Terminal in New York. Natural gas is quickly gaining popularity as the cleaner, che

 

              FILE - In this Thursday, May 28, 2009, file photo a 2010 Ford Transit Connect sits near Grand Central Terminal in New York. Natural gas is quickly gaining popularity as the cleaner, che
FILE - In this Thursday, May 28, 2009, file photo a 2010 Ford Transit Connect sits near Grand Central Terminal in New York. Natural gas is quickly gaining popularity as the cleaner, cheaper fuel of choice for truck fleets, buses and taxis. Ford Motor Co. said Tuesday, March 5, 2013, it sold a record 11,600 natural gas vehicles last year, up 350 percent since 2010. (AP Photo/Craig Ruttle, File)