80% more energy is all that is needed

[T]he world’s poor people are starving and dying for lack of cheap energy today. Driving the price of energy up and denying loans for coal-fired power plants is depriving the poor of cheap energy today, on the basis that it may help their grandchildren in fifty years. That is criminal madness. The result of any policy that increases energy prices is more pain and suffering. Rich people living in industrialized nations should be ashamed of proposing such an inhumane way to fight the dangers of CO2, regardless of whether those dangers are imaginary or real.

Willis Eschenbach from, http://wattsupwiththat.com/2013/08/21/double-the-burn-rate-scotty