On Wednesday afternoon I was driving southeast from Houston in the direction of the Houston Ship Channel and its dozens of oil refineries and petrochemical plants. The air here is cleaner now than in decades past, thanks in large part to tighter federal air requirements. And despite regulations, Houston’s Refinery Row continues to grow, processing ever more millions of barrels of oil a day into fuels, plastics and chemicals. For Texas it’s a vital economic powerhouse. For Obama-era environmentalists it has represented a potent source of emissions that need to be controlled and taxed.

— Forbes