Boston's sewage treatment plant, where human waste partially transforms into natural gas. In fact there is only enough gas produced to serve the site itself. Waste mainly ends up in a fertilizer pellet plant. The good news: discharged water is clean. The bad news: there are fewer lobsters in the harbor now (apparently lobsters feed on human waste)! Кто сдает продукт вторичный, тот газуется отлично!