Biomass Boilers
The term Biomass most often refers to organic matter such as timber and crops grown specifically to be burnt to generate heat and power.
Biomass is sustainable and generally carbon neutral because the carbon released in the combustion process is offset by the carbon trapped in the organic matter by photosynthesis during its growth. To be truly carbon-neutral we need to make sustainable use of plants or trees as fuel, and replant them as we harvest them - so that the carbon is reabsorbed in a continuous and virtuous cycle.