Backing Away from the Energy Cliff: A Permaculturist's Guide to Thinking About Energy.\xa0 \xa0 Fossil fuels are the underpinning of our civilization, and our desperate attempts to keep cheap oil flowing runs the risk of collapsing ecosystems and cultures. This lecture uses a permacultural approach to evaluate energy sources and to design possible energy futures.\xa0 \xa0 Presented by Toby Hemenway at PV1 in March 2014. \xa0 Learn more at www.permaculturevoices.com/146 \xa0 Support the show at www.permaculturevoices.com/support