Take a read of the Economist website; aside from the price of oil rising, prompting investment in other fuel sources (both renewable and non-renewable), you can see truthful estimates of CO2 emissions by industry.
Clearly fossil fuel usage is both very important to us and potentially an issue with warming the planet; while we have been used to nothing but oil in our lifetimes, rest assured both that there are other sources that will be burnt in the future, and that oil cannot strictly run out - simply that the little that is left become ever more expensive both to extract and sell, as the laws of economics prevail.