If your celebration of the holidays is over, don’t forget to recycle. Irons Oaks Environmental Learning Center is the location for dropping off discarded live Christmas trees. Trees must be free of all ornaments, lights, wire and tinsel. The collections continue through Jan. 18 at the Irons Oaks parking lot on Vollmer Road just west of Western Avenue. The annual program, now in its ninth year, has helped the Homewood-Flossmoor Park District make great mulch for trails throughout the park system. There is no scheduled drop-off event this year. Find a string . . .