Mass. Interfaith Power & Light and the Sierra Club are sponsoring an Energy Solutions Day on Boston Common at Parkman Bandstand Saturday, Sept. 13. Join with others to enjoy the fall day, listen to music and learn about energy solutions which will save you money, cut your greenhouse gas emissions and promote good stewardship of the planet. Plus, get a free energy-saving lightbulb while supplies last!

For more information or to volunteer, contact Carol Oldham (617-423-5775; carol [dot] oldham [at] sierraclub [dot] org).