It stops when EROEI hits 1:1, though, and it's no longer possible to get a net positive energy result from recovery/refining. The tar sands are already in the 3

It stops when EROEI hits 1:1, though, and it's no longer possible to get a net positive energy result from recovery/refining. The tar sands are already in the 3:1 range. Corn ethanol is even worse, 1.3:1. In practice, it will stop before that, when the recovery costs exceed the cost of wind/solar. In the meantime, it will continue to be LESS expensive than unsubsidized wind/solar.