Lew Barckley, left, General manager of Canada Dry's Waltham (mass.) plant, stands proudly by the company's newly-purchased glass and metal container crusher as a group of New England's leading environmentalists line up to view the machine and register their approval. The viewing took place during a special seminar held at the Waltham plant to review plans for a three-pronged anti-pollution program which the plant will soon launch as part of the Canada Dry Corporation's recently-introduced "Operation Ecology."