He's half way there, anyway. It's a start.
What they are doing is moving from global warming to climate change to all pollution is bad. As the good book says there is nothing new under the sun and we are fixing to have the whole Rachel Carlson Silent Spring experience again. I think they will keep hammering the CO2 thing for the forseable future but use that as an entry into the whole man bad because he pollutes the planet thing once again.
Not really. It is incontrovertibly true that the human addition to the CO2 level in the atmosphere increases warming. But the relevant question is....HOW MUCH. And right now, the best evidence is "not much at all compared to other phenomena". I'm a lot more scared by the lack of sunspots, and the potentially hugely disastrous effects of "global cooling" (aka anohter Ice Age).