Biomass is the biological material derived from living organisms. Energy is derived directly from biomass via combustion to produce heat or indirectly after converting it into various forms of biofuel with the help of thermal, chemical & biochemical methods. Wood is the main source of biomass energy.
Using biomass as a fuel produces air pollution in the form of carbon monoxide, carbon dioxide, Nitrogen oxides , VOCs, particulates and other pollutants at level above those from traditional fuel source. Black carbon, a pollutant created by combustion of biomass and biofuel is possibly the 2nd largest contributor to global warming.