Wal-Mart Announces Environmental Goals

Wal-Mart Stores Inc. has unveiled an environmental plan to boost energy efficiency, cut down on waste and reduce greenhouse gases tied to global warming as part of a wider effort to address issues where it has been pummeled by critics...

Wal-Mart recently opened an experimental store in McKinney, Texas, to study environmental efforts such as heating the store with used cooking and motor oil. Scott said the savings so far were not enough to cover the cost of building the store, but that it may be economically feasible if Wal-Mart takes advantage of its size and rolls out such changes across the chain...

One Wal-Mart critic dismissed the green targets as a diversion..The Sierra Club, for its part, welcomed the news but added a caveat."