With at least a one hundred year reserve of domestic shale gas in America, a huge price difference between natural gas and diesel or gasoline, and the opportunity for significant energy security benefits offered by a domestic resource, businesses, consumers and governments have realized the need to incorporate natural gas into the national transportation mix.

FORBES: Guest Column: The Shift To Natural Gas Vehicles Is Happening

Energy Secretary Ed Davey said shale gas was a promising new potential energy resource for the UK. It might contribute significantly to energy security and substitute for imports which are increasing as North Sea gas is decreasing.

BBC: Gas fracking: Ministers approve shale gas extraction