The Hershey Company says two more of its plants have achieved zero-waste-to-landfill (ZWL) status. With the addition of the Y&S Plant in Lancaster, Pa., and the Robinson Plant in Robinson, Ill., The Hershey Company now has six U.S. plants that no longer dispose routine waste into landfills. Moreover, it has exceeded its goal to convert five plants to ZWL by 2015 well ahead of schedule.