Love him or hate him, you gotta admit The (now freely available to all!) Mustache of Understanding is good today. He draws a line from Wal-Mart to China, nailing the message that renewables + efficiency saves money and drives innovation. Not a whiff of hippie do-gooder about it.

I’ve long said that Wal-Mart’s green turn is going to be remembered as much for its influence on other institutions as for its concrete results.