An energy source that can be easily replenished (i.e. solar, wind, geothermal, hydropower). Renewable energy sources can be used to produce secondary energy sources including electricity and hydrogen
US Department of Commerce, National Oceanic and Atmospheric Administration, Glossary - NOAA's State of the Coast (SOTC), Washington, DC, USA 2013. http://stateofthecoast.noaa.gov/glossary.html, (CoaStormEmr - Amer) {881}