With the new CAFE standards coming into effect this is just the tip of the iceberg. Plug-in hybrids (see http://featured.matternetwork.com/2008/1/plug-ins-race-revolutionize-transportation.cfm) and ethanol vehicles can have the greatest impact on a company's fleet fuel economy average, so expect the number of green vehicles to double each year. Hopefully the tax code will change to reflect the emphasis on cleaner vehicles.
John Gartner
Editor, matternetwork.com