SOUTH BEND, Ind. (AP) — The city of South Bend has installed 90 solar panels atop its convention center in an effort to reduce greenhouse gas emissions and save taxpayer money.

Mayor Pete Buttigieg says the electricity produced by the panels atop the Century Center will offset greenhouse gas emissions by the equivalent of 2,000 gallons of gasoline or 19,000 pounds of coal per year. The city says the panels are part of a $5 million energy-efficiency project.

The city also is converting a large portion of its fleet to compressed natural gas and recently opened its own CNG filling station in conjunction with bus service provider Transpo.