The fossil energy sources when burned release carbon accumulated over millions of years. When burned the biomass discharges only the green house gases that the plants had previously taken in during growth.

That is why biomass, available sufficiently and in any form, solid, fluid or gaseous, is an environmentally friendly combustible material. Biomass can be used for the roduction of energy in the form of heat, cold, electricity as well as for extraction of  fuel (biodiesel, vegetable oils).