 carbon dioxide emissions from power plants and so forth. So, Desi, what is the good neighbor rule? What does this pause, at least for now, actually mean? Well, first of all, remember, pollution does not respect borders. So maybe if we called it migrant pollution, Republicans would care about it. But anyway, this is for pollution that drifts downwind across state lines. Imagine if you're sitting behind a polluting truck and you get a tailpipe full of their pollution. Yeah.