Norm,
I am in favor our using our domestic natural gas in the transportation sector. It looks like our national labs are willing to look this as an option once again-
A ‘natural’ solution for transportation
http://www.anl.gov/Media_Center/News/2012/news120202.html
“.Hoping to expand the pool even further, researchers at the U.S. Department of Energy’s Argonne National Laboratory have begun to investigate adding one more contender to the list of possible energy sources for light-duty cars and trucks: compressed natural gas (CNG). ”
…….Because the domestic production of natural gas has increased dramatically over the past ten years, making a large number of the cars and light trucks currently on the road CNG-compatible would help to improve U.S. energy security. “As a country, we don’t lack for natural gas deposits,” said Argonne mechanical engineer Thomas Wallner. “There are fewer obvious challenges with direct supply than with most other fuels.”
Last time I checked Yahoo’s green car web site the Honda CNG vehicle was rated as close to the greenist around as well.