Investing: Oil-Shale and Tar-Sands Mining

Its all about EROEI (Energy Returned on Energy Invested)

I don’t understand! Why would anyone put money into extracting oil from shale and tar-sand? Look at the economics of this kind of operation. What is the return from investment, what is the impact on the environment, what’s with this mentality that wants to keep the oil beast alive? Put a stake in its heart and be done with it.