In five to six years, fracking is going to fall further in the supply due to depletion.

I realize geology is not a popular field of science, but the exaggerated estimates of frackable fuels pushed by energy companies are without merit, although most fracking opponents have ignored this.

My favorite example:  a couple years ago, the US Dept of Energy estimated that there would be 15 billion barrels of frackable oil in the Monterrey Shale formation in California.  The current, official estimate is 26 million barrels.  Get ready for oil rationing, the only question is the timing.

Efficiency has a role, but doing without also has a role.  Endless growth was not possible on a finite planet.   Solar panels and wind farms are nice but they're not going to replace all that super concentrated energy.   We use fossils because they're more concentrated than the alternatives.  If we were smarter we'd use the rest of the oil and minerals to build a bridge to a relocalized, smaller economy.