Why can't cars run on anything but gas?

Question

Why can't cars run on water or something else?

Answer 1

Because of something called the Internal Combustion Engine.  

http://en.wikipedia.org/wiki/Internal_co...

Answer 2

cars can run on different types of fuel...but the issues are that they are very expensive to run and very expensive to build so your average guy cant afford it....someone will invent a cheaper way to run cars soon i hope

Answer 3

get some water...try to burn it...not so much power there...

Answer 4

they can bu car company's just want to make more money

Answer 5

they can but gasoline is by far the most productive combustible material that we have available. water is not flammable, but way back in the late 1900s the fist cars were steam engines