We debated whether to write up this story of Wal-Mart’s alleged "going green" in Daily Grist, but at a quick glance it seemed trivial and a bit self-serving. But Joel Makower, who knows as much about these matters as anyone, thinks there may be something to it.

I, for one, am skeptical that the great, great Wal-Mart turnaround is nigh. But I’m also not ready to write off Lee Scott or his company as sustainability poseurs. I believe we’ll see a steady stream of new initiatives coming out of the company’s Bentonville, Ark., headquarters in coming months.

He even quotes an anonymous colleague tantalizingly saying, “This has the potential to be the fastest turnaround ever on sustainability and the most comprehensive." If that were true it could have potentially epochal consequences. As Joel notes, Wal-Mart may account for as much as 1% of China’s entire GDP. That’s a lotta skrill.

Of course some folks will say that "green Wal-Mart" is an oxymoron. Activists of virtually every stripe have legitimate beefs with the company. But the thing here is to be dispassionate. The ‘Mart has more power than many governments. It is, for good or ill, here, and enormously influential. If even a fraction of its power can be turned to stimulating green markets and establishing green practices, it could be a game changer.