This document discusses various topics related to energy conservation and renewable energy resources. It notes that over 70% of US electricity comes from non-renewable sources and that improving energy efficiency in buildings by 10% could reduce emissions equivalent to taking 30 million cars off the road. It then outlines the five main types of renewable energy resources - solar, hydroelectric, biomass fuels, geothermal, and wind - and provides statistics on what percentage of US energy comes from each renewable source, ranging from 6% for hydroelectric to under 1% for geothermal and wind energy.