A plant captures energy from the sun through the photosynthesis
process, so when plant material is burned, it is actually
releasing the energy from the sun. But unlike solar energy,
which is produced by the heat of the sun, we refer to the energy
derived from plant material as biomass. Biomass is considered an
important option for renewable energy and there are a lot of
different ways that this energy is derived and used. Plants can
be grown specifically for the production of economically
friendly energy, or the residue that is left after plant
material has been processed for other needs can be used as a
source of renewable energy. When fuels are taken from plant
material, or bio mass, they are called bio fuel. The term bio-
fuel broadly covers the terms: When bio mass is derived from
trees, grasses and other non food sources, it is called
cellulosic biomass. Although the plants are not used to produce
bio gases directly through the fermentation of the carbohydrates
to make bio alcohol or bio ethanol, the cell