using biomass to produce energy is a source of pollution
water_pollution is pollution. wind is not source_of_energy. man_made_pollution_source is not artifact. industrial_waste is pollutant. pollutant is waste. biomass is not fuel. wind is source_of_energy. man_made_pollution_source is artifact. combustion_of_fossil_fuels is common_source_of_air_pollution. biomass is fuel.