Jets no longer run solely on fuel derived from petroleum, thanks in part to Colorado-based Red Rock Biofuels. They signed contracts with FedEx and Southwest Airlines for "renewable jet fuel" that is derived from wood-based biomass.
Jul 22, 2015   The Denver Post - Business
Oil prices are at a five-year low with gasoline prices averaging $2.67 a gallon, lowest since February 2010. Furthermore, they are expected to drop another 17 cents to $2.50 a gallon in time for Christmas, so why not raise the gas tax by a nickel?
Dec 10, 2014   The Atlantic
The global courier has transformed the way packages are delivered around Paris by deploying large eco-friendly tricycles that go beyond the curb.
Aug 31, 2010   TheCityFix