Walmart Greener?

When people say Walmart, I think of corporation, cause thats what it comes down to. With news that Walmart is trying to become greener, questions begin rolling in as to how they will do it, or why? But can Walmart even be green? I mean first of all its a football field of concrete with consumption and pollution, so what is being greener going to do? It's like Walmart went to Iraq and said, 'Oops," and tries to befriend the terrorists. It just doesn't work like that. But Walmart being one of the top corporations making money right now, next to gas companies, shouldn't they do something about this global warming. The best thing I can think of for Walmart to be greener would be to give their company away to the terrorists. Therefore we can eliminate them and the global warming problem. Both parties would be happy. Two birds with one stone, I'm a regular George Bush...