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Sweden is converting household food waste into clean fuel for its buses. Cities like Linköping, Malmö, and Västerås collect leftovers from homes, restaurants, and supermarkets, process them in biogas plants, and turn them into biomethane, also called bio-CNG. This fuel runs public buses, making transport more sustainable while reducing greenhouse gas emissions.

The process is simple. Food waste is separated at home, taken to treatment plants, and digested by microbes. The result is methane gas for buses and nutrient-rich fertilizer for farms. In Västerås alone, nearly 9,000 tons of food waste produced enough biomethane to power 21 buses for a year, cutting over 1,000 tons of CO₂ emissions. Sweden shows how food scraps can create clean energy and close the waste loop.

Ref: smartcitysweden . com