The use of biodiesel fuel makes diesels a good alternative to hybrids. B10 diesel, which contains ten percent bio fuel, reduces pollution by fifty percent, provides improved mileage, and reduces engine wear. Chrysler has for the past two years tested a Chrysler 300 diesel that gets 40 mpg at 75 mph. Bio fuels are domestically produced which improves our economy. A diesel hybrid vehicle is probably the best option. Ford is coming out with one in the next few years.