The document discusses various sources of energy in the United States including renewable energy sources like wind, solar, geothermal, and hydropower as well as non-renewable sources such as oil and gas, coal, and nuclear energy. It notes that the US has large investments and production capacities across many energy sectors. For example, it predicts $700 billion will be invested in renewable energy over the next two decades and the US is a top producer of geothermal and biomass energy as well as having substantial oil, gas, coal, and nuclear industries.