Limited Oil Reserves
"All the easy oil and gas in the world has pretty much been found. Now comes the harder work in finding and producing oil from more challenging environments and work areas."
— William J. Cummings, Exxon-Mobil company spokesman, December 2005
"It is pretty clear that there is not much chance of finding any significant quantity of new cheap oil. Any new or unconventional oil is going to be expensive."
— Lord Ron Oxburgh, a former chairman of Shell, October 2008
1.Human cannot find new oil field.
2.Human accelerate the consumption of oil.
1.Huge energy innovation or technology improvement take place.