INDUSTRY'S ENVIRONMENTAL PROGRAM ADVANCING

The U.S. petroleum industry's environmental enhancement campaign is advancing on several fronts. There were these developments last week: Mobil Corp.'s chemical subsidiary began a national program to recycle plastic carryout sacks it sells to supermarkets. Expanding its expressway retail operations, Mobil committed to upgrade the appearance and install improved equipment at 10 service stations it operates under a new contract with the Massachusetts Turnpike Authority.