Quote Originally Posted by maladroit
IMO the two main problems with oil are that the usa doesn't have enough oil to supply itself, and there is a limited amount of oil left in the world...
These are two big problems. The fact we don't have enough domestic oil means we pay our eneimeis for it, and the fact that it is limited means eventually we will have to change our infrastructure for whatever comes next or watch our economy collapse for lack of energy.

But the biggest problem is one you did not mention --- oil is an extremely dirty and polluting energy source. For me, that is the biggest reason to find alternative energy sources. And if the alternative can be domestic and renewable, like, wind, solar, tide, geothermal, etc., then that has the added benefits of solving the two problems you mentioned too.