Now I have an answer. Nathan Richardson:
I have a new piece in the Milken Institute Review that looks at EPA’s current and near-future carbon emissions rules. It starts at the beginning of the story and is aimed at a more-or-less general audience, so if you haven’t been following the issue it’s a good place to start.
*No one has asked me this, but I'm sure it is a good question with, now, a good answer.