In today’s world you have 3 choices in what your car runs off of. Gas which runs off of unleaded gasoline or diesel. Hybrids which runs off of gas and electric, and electric which runs of electricity. Unfortunately the usage of gas is bad since there is only a limited amount and is going to rise no matter what. And with gas prices predicted to rise to 5 dollars gas is beginning to look like the wrong choice with only max of 40ish mpg. Hybrids are a step up to better money saver for mpg but still only gets around 60ish max mpg. Finally electric which uses a battery which is charged instead of fuel. Only actual problem with this is the car only goes around 100 miles (Nissan leaf). But then again who travels more than 100 miles in a day?