The document describes a 35kW down-draft solid biomass gasifier that generates producer gas from wood chips. The gas is filtered and then used to power an internal combustion or diesel engine, which generates electricity. It also discusses the potential of geothermal energy, noting that worldwide geothermal power currently produces 8,900 megawatts but that with more research and development the potential could be over 72,000 megawatts, enough to power a mid-sized US state.