Unrelenting in its quest for eco-domination, Wal-Mart has announced a plan to keep tabs on some suppliers’ energy efficiency. Through a partnership with the Carbon Disclosure Project, Wal-Mart will request emissions data from about 30 companies that collectively supply DVDs, toothpaste, soap, milk, beer, vacuum cleaners, and soft drinks. (Sure they’re all commonly used, but — random, anyone?) The project is very much a wee first step, as Wal-Mart has about 68,000 suppliers; the company has not yet determined whether it will use the information gleaned to actually demand that suppliers reduce emissions.