Here's the important point: While EPA considers these questions, the Clean Air Act's "best available control technology" requirements remain fully in effect for carbon pollution, just as for any other dangerous pollutant. That's another important court victory for the fight against climate change, for EPA and the Clean Air Act, and -- most importantly -- for all of us.
Countries leave here with a sense of the various options for a new agreement in Paris and some greater clarity on how each country is preparing for their specific commitments that will be captured in this agreement. It will be a difficult negotiation, but some signs emerged this week on the potential shape of the agreement.
Some commentators' logic essentially boils down to two false perspectives -- that U.S. cuts in its power sector emissions don't matter in the context of global efforts to address climate change and that the rest of the world, particularly China and India, isn't doing anything to curb their pollution. Both assumptions are wrong.