http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
waste management, energy production and carbon footprint reduction
"Biogas is a source of renewable energy which can be produced by anerobic digestion of organic matter, typically waste materials and renewable resources including agricultural waste, municipal waste, plant and food waste. Biogas plants are stable and controlled renewable energy and the biogas plant sector is very important in energetic transformation where renewable energy sources will soon play a dominant role."--
edited by Wojciech Czekała, Christian V Stevens.