Obama mostly saying the right things on climate change

Climate Progress notes that Obama said this today in Germany:

As I told Chancellor Merkel, unless the United States and Europe, with our large carbon footprints, per capita carbon footprints, are willing to take some decisive steps, it’s going to be very difficult for us to persuade countries that on a per capita basis at least are still much less wealthy, like China or India, to take the steps that they’re going to need to take in controlling carbon emissions.

It seems so simple, and yet, so many (and we're talking Democrats) don't get it. Instead, they just repeat the point that, in the future, China will be a much larger total carbon emitter than the U.S. (true!), ignoring the fact that presently -- and for the foreseeable future -- we are much higher emitters per capita.