EPA recently said it would no longer try to quantify the harms done by the two most serious, widespread air pollutants. Given that these are the most fully understood of all environmental impacts, it’s not clear what future regulations, if any, might be still subject to cost benefit analysis. This didn’t come out of the blue. Rather, it is the culmination of a series of steps that began when Trump took office in 2017. By 2018, Trump’s executive orders and other administration actions had led me to write a post about “the rise of benefit-blind analysis.” Little did I know what was coming down the road.