Wind The cost of wind power has fallen 66% since 2009. Hydropower The hydropower industry employs approximately 55,000 U.S. workers. Solar The cost of solar panels has dropped by 48% since 2010. Geothermal Domestically produced, geothermal energy is not subject to fluctuations in fuel cost. Waste-to-Energy Waste-to-energy plants employ approximately 7,000 Americans. Biomass Over 80 biomass plants across 20 states provide renewable power from organic waste.