Biomass is defined as the energy that comes from living organisms as well as the waste from these organisms. Leftover cooking oil is an example of biomass. The cuttings from freshly chopped grass is another example. Originally thought of as only useful as fertilizer, cow manure is an example of a type of biomass that has multiple uses today. What is unique about biomass is its ability to be used as fuel which relieves human dependence on fossil fuels and provides a creative way to recycle garbage.