In the motor vehicle industry, the use of hybrid cars has gained popularity over the last few years. Instead of driving cars that are exclusively powered by fossil-fuels, more people are finding it better to drive hybrid cars, which are partly gasoline-powered and partly electric. A hybrid car is assembled in such a way that it makes use of both a combustion gas engine and electric motors that derive their power from rechargeable batteries, which are extremely important in increasing the fuel efficiency of these vehicles (Vaughan). This kind of cars record higher gas mileages than cars powered exclusively by fossil fuels. For instance, when driving Toyota Prius (which is a popular hybrid car) in a city, the mileage can go as high as fifty one MPG. In comparison, the mileage of a Toyota Camry (which is exclusively gas-powered but of the same size as a Toyota Prius) exposed to similar conditions is only about 21 MPG. Though the very first hybrid vehicles scored poorly in terms of power and responsiveness as compared to conventional gas powered vehicles, the latest hybrid cars have impressive power and responsiveness scores. Hybrid cars are also more environmental friendly as they consume less fossil fuel and thus produce fewer emissions (Vaughan). The size of hybrid cars is not necessarily small and they are more costly (by about $3000-$6000) than conventional gas-powered vehicles. However, the government, in its endeavor to cut down on the use of fossil fuels, offers subsidies in terms of tax credits to those buying hybrid cars. Generally, hybrid cars need fewer repairs than conventional cars.