This is a critical point. Energy return on energy invested (EROEI) is a concept everyone should be familiar with. I suggest beginning with the work of Professo

This is a critical point. Energy return on energy invested (EROEI) is a concept everyone should be familiar with. I suggest beginning with the work of Professor Charles Hall of SUNY-ESF. http://www.esf.edu/efb/hall/energy.htm http://www.esf.edu/efb/hall/energy.htm