SOUTH PORTLAND — Clean and green are themes Saturday at Southern Maine Community College.

From 9 a.m. to noon the college will host the Solar Power and Energy Efficiency Fair for Homeowners in the SEA Center at 62 Fort Road.

The fair offers visitors a chance to see the newest technology and practices for energy-efficient homes while meeting energy auditors and representatives from local contracting, supply and energy companies.

Admission to the fair is free. There will also be presentations on using solar power for electricity and heating water, and on rebates and financing packages available for energy-efficiency projects.

From 10 a.m. to 2 p.m., volunteers are invited to join college staff and students, and the Fort Preble Preservation Committee in the annual cleanup of the historic fort, built in 1808 and manned until 1950. There will also be tours of some of the underground rooms at the fort in the afternoon.

Volunteers are asked to meet in the parking lot between the Transportation Building at 123 McKernan Drive and Bunker Lane at 10 a.m. Please wear shoes, clothes and gloves appropriate for outdoor work, and bring hand tools if possible.

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