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...Executive summary october n independence mall west th floor philadelphia pa ready to roll overview of challenges and opportunities for alternative fuel vehicles www dvrpc org in the delaware valley s report provides an policy makers citizens greater region about expanded use full can be found publications section what are environment these emissions other air afvs combinations toxins reduced by improved vehicle technology fuels technologies reduce cleaner burning petroleum on road include low carbon national security a stronger domestic sometimes blended with electricity economy from dependence foreign oil hybrid combining internal combustion supplies engines electric motors covered this used more than billion gallons gasoline those most widely available today or likely million diesel at prices become next ten twenty years costs regional consumers over annually fall into three broad types is imported united powered engine ice states all it outside such as biofuels biofuel blends presen...