In a previous article we talked about how alternative fuels for automobiles came to be developed and why they are increasingly popular. The next question is: what are the options for consumers who are interested in this type of vehicle? The following are some of the best known versions of cars that use traditional fuels: * Compressed air cars are emissions free piston engine using compressed air as an energy source. They do this when cold air out of carbon fiber pressure tank is heated by heat from the environment to the normal temperature. This air is delivered to the engine as an energy source. * The use of electric vehicle batteries lead acid absorbed glass mesh, nickel metal hydride, lithium ion, lithium Poly-and zinc-air energy resources. These batteries are rechargeable, but expensive. * Solar cars are electric vehicles that run through solar energy. These vehicles have solar panels that trap the sun's energy and convert it into electricity. Although it is good that the energy they use is free, not very practical for use as a form of transportation. Now, normally used in competitive racing in Australia, USA and Canada. * Ammonia powered car has a diesel engine, which is adapted to the use of ammonia. During combustion, no emissions, but can be dangerous in comparison with gasoline or LPG. * Transporting biofuels with one of these three: bio-alcohol called ethanol, biodiesel or biogas. The use of ethanol as fuel is a renewable resource because it can come from sugar-rich crops. It is very encouraging given the environmental and economic benefits. Biodiesel on the other hand has a lower density than fossil diesel counterpart. The only advantage is that biodiesel produces fewer emissions of diesel and gasoline engines. Finally, biogas is used when a gas is purified unrefined. In the process, water, particulates and hydrogen sulfide is removed. * Cars use hydrogen, either the combustion of hydrogen or fuel cell engine conversion engine work. The only byproduct of two processes, water and heat so that is not harmful to the environment. * Liquid nitrogen vehicles are cars that are easy to fill with nitrogen gas as it gets. This is accomplished by storing energy and using this energy in the air to liquefy. As the air is liquefied, liquid nitrogen is produced by evaporation and circulated in the engine. When heat is exposed to liquid nitrogen, leading to a power source that can power the motor. * Liquefied Petroleum Gas (LPG) vehicle uses propane and butane gas as an energy source. It feels like the traditional burning gasoline, but provides small amounts of carbon dioxide. * Steam motor vehicles which are wood, coal or burning ethanol in a grid. The heat turns water into steam, which in turn creates a pressure. These pressures can now move the engine. These cars take quite a long time to boot, but once on the track, can take up to sixty miles per hour. They are good for transport, but are very expensive. * Hybrid cars are also known as hybrid gasoline-electric or gasoline-electric hybrids. They use a lot of systems for the car to work. Initially have a gasoline engine, and then also have an electric motor that the oil crisis in the different stages of the store. Currently Toyota Prius is the first and largest commercial production of hybrid cars in Japan since its inception in 1997. This was followed by Honda in 1999 when he brought his Honda Insight.