Boston GreenFest 2009

GreenFest: August 20-22, City Hall Plaza

"Free, three-day sustainability and cultural extravaganza presented by the Foundation for a Green Future. Learn about sustainability through art, music, discussions and interactive exhibits about eating and growing organic food, improving nutrition and health care, greening our city, building healthy communities, creating green jobs, and engaging in a sustainable, green economy." from Boston.com

more information here