This is just one of many examples:

http://www.youtube.com/watch?v=Tf4gOS8aoFk

For way to many years we have been pumping oil from the earth and burning it while polluteing our air. All along the greatest natural resource has been sitting untapped.

I sincerely believe that everything on the earth has its purpose. I highly doubt that the oil underground was meant for us to burn. It only makes sense that H20 should be used for energy.