Sure...

A sign, at the Green Living Show, proclaiming what Wal Mart is doing to help the Earth. "Improved insulation in our new stores ..." "We've replaced our overhead lights with [lower wattage] bulbs..." etc. All these things save Wal Mart money. Does this make them a green hero, or fiscally responsible? They did have some nice bamboo shirts on display though, so it's a start.