Renewable Power 101: How Does Biomass Power Paintings?
https://www.greenmountainenergy.com/why-renewable-energy/renewable-energy-101/biomass/The great thing about biomass energy (or simply “bioenergy”) is that its sources are plant and animal waste. So not only does biomass energy divert this organic matter from the waste stream — it turns it into something we all need, without polluting the planet.