signature: IM 11 YEARS OLD!!!!!!
If that's true I admire you for wanting to educate yourself about such an important subject facing this nation.
Yes, we have oil all over America, but the problem is we don't have enough...enough to meet rising demand and a sky rocketing population.
We are at the plateau of what is known as Peak Oil, where oil production is barely meeting demands, and due to an economy based on perpetual growth and reliant on cheap energy to produce said growth we are riding the 'bumpy' plateau now i.e. every time oil prices rise the economy recedes, then when oil prices drop to due to lack of demand the economy resumes growing. How long this can continue is anybodies guess.
Make no mistake, green energy will not replace oil, nuclear might but that is terrifying to think about given what has happened at fukishima. Natural gas and coal will help but they are not a substitute for oil. We are not going to run America on battery powered cars while we are in the midst of shutting down coal powered electricity plants, and havent built a nuclear plant since the 70's.
This is a very complex subject, you could read on and on about it and still come out confused. I'm sure some others with a different view point than mine will chime in and help you out.