a move on greenhouse gas emissions

I know the preference is to have Congress pass legislation to try to put us on a path to slash our greenhouse gas emissions, which with luck might make climate change less bad and in any case would probably greatly reduce our reliance on the Middle East for oil.

But the move by EPA Administrator Lisa Jackson announcing intent to list carbon dioxide and other greenhouse gasses as a danger to public health is wise. It is a back-up should Congress fail to act - and perhaps a spur to wavering members to pass something rather than leave it to the EPA.