Biomass has a cost, both financially and environmentally. Biomass is quite expensive as it is $0.10 per $/kW-hr. But we wouldn't have biomass unless their was a pro side to the cost. Environmentally, biomass is clean energy. That basically means it doesn't do any bad to the environment. People who use biomass also receive tax credit which is the amount of money someone can subtract from the tax that they owe the government. The cost of biomass may be expensive financially, but it pays off by being clean and going green!