>>509416268
>what is ERoEI?
https://youtu.be/_mL9CfmBI3s
Energy Return on Energy Invested. It is principal that can be applied to all living systems. It is also a metric used in resource mining for determining how much resources are needed to obtain the resources being mined. Most oil wells do not just "run out". The return on investment is not worth obtaining what remains in the well. 100 years ago we started mining the oil nearest to the surface that was easiest to obtain. It would cost 1 barrel of oil in energy to obtain 300 barrels of product. Now all of that easy stuff has been mined. Today it costs 1 barrel of oil to obtain only 12. So when a nation claims to possess oil reserves they are not claiming to be able to obtain them all. In fact most oil reserves are not recoverable. The oil in Antartica is covered by 2 miles of migrating ice sheets. With this method we determine the limits of our natural resources