Environment – Biomass is a green alternative to fossil fuel as it delivers 75 degrees flow rates that we are used to with fossil-fuelled boilers. See Biomass Costs & Outputs or Different kinds of biomass.
When biomass is burnt it releases carbon dioxide much like fossil fuelled boilers, contributing to the greenhouse effect. However, where fossil fuels release carbon which has been locked up in the earth for millions of years, the plants absorb carbon during their growth and release oxygen.
This closed circle is called The Carbon Cycle which makes biomass sustainable.