The basic problem with ERoEI is that the number you get depends dramatically on how rigorous your calculation is, and applying the same amount of rigor on two d

The basic problem with ERoEI is that the number you get depends dramatically on how rigorous your calculation is, and applying the same amount of rigor on two different sources doesn't mean that they're off by the same amount. Fossil fuels have tons of hidden externalities, so they will usually look way better at a glance, but that doesn't necessarily mean anything.