GGR333H5 Study Guide - Final Guide: Watt, George Monbiot, Landfill Gas
Document Summary
Eroei stands for energy returned on energy invested. Key insights: does not make sense to burn 2 units of energy to extract 1 unit of energy, negative eroei = energy bankruptcy. How does it apply to whale hunting in the mid- Smog is not made of carbon dioxide, but rather ash, unburnt fuels, and noxious gases. Tragedy of the commons: the economic problem when every individual tries to reap the benefits of a shared resource. Eventually demand exceeds supply and every additional unit that is consumed harms everyone else. Renewable =/= sustainable: describe briefly old-fashioned conventional oil recovery and the usual recovery percentages associated with each phase. Oil recovery: natural flow: underground pressures forces oil up sometimes gushers. 12-15% recovery: secondary recovery: inject water into reservoir to provide increased pressure. 15-20% recovery: tertiary (enhanced) recovery: inject steam, c02, n or chemical polymers.
