The four main types of biomass fuels are wood and agricultural products, solid waste, landfill gas, and alcohol fuels. Biomass fuels make use of the energy imparted by the sun and stored in its organic matter.
Incineration of wood and agricultural products produces the vast majority of biomass energy, which still accounts for only a small percentage of the total energy use in the United States. Though biomass fuels may cost more than coal and petroleum, they produce less pollutants and help to reduce landfill waste, which are both good for the environment. More than two-thirds of the biomass energy produced is used by American industry, as of 2015, but households and electric utilities are seeing slow growth.