Regulators Optimistic Truck Makers Can Limit NOx Without Increasing GHGs

EPA, California and industry officials are expressing greater optimism that truck makers can implement strategies for curbing nitrogen oxides (NOx) without degrading fuel economy and boosting greenhouse gases, as both EPA and the state begin developing stricter NOx controls for heavy-duty trucks. The officials cite the increasing availability of several technologies -- at least some of which were not envisioned when the Obama EPA issued its phase 2 truck GHG rules in 2016 -- that can be used to help...