Green Car Technologies

Speaking of environmentally friendly cars there are a bunch of green car technologies. The most promising alternative technologies are biodiesel, diesel, e-flex, electric, ethanol, hybrid, hydrogen fuel cell, hydrogen internal-combustion, natural gas, plug-in hybrid. These types of clean fuel definitely have lot of advantages over gasoline. But I was looking through some gas credit card offers and there's still a question if credit companies are going to issue cards for alternative fuel.