For many years, key persons associated with Citadel have worked with businesses, industries and public utilities to develop beneficial use projects from landfills gas, biomass and MSW. This gas is a reliable, renewable energy source that is produced naturally as waste decomposes in landfills. When collected, it can be used directly as medium Btu gas for industrial use or sold to gas-to-energy plants to fuel engine or turbine-driven generators that produce electricity.