Litter Ambassadors Sunday (Forest Park): As a part of the Litter Ambassadors program, volunteers will assist maintain the picnic and barbecue areas of Forest Park clear in June. Litter Ambassadors will even distribute rubbish luggage and information their neighbors within the correct methods of disposing of trash. Register here. George Seuffert Bandshell in Forest Park. nycparks.gov. Free. 1 to three p.m., Sept. 19.
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