North Berwyn Park District is seeking volunteers to participate in the annual Think Green City Clean-Up on Saturday, April 20th with a 9a.m., kick-off at various locations throughout the city including parks, schools, Roosevelt Road, Cermak Road, Kriz Park, North Berwyn Park District Community Center and Brocato Playground. Volunteers interested in participating can register by calling 708-749-4900 to be assigned to a location near them. Immediately after the clean-up, the Park will be hosting a ‘thank you’ lunch for all volunteers at a specified location.