Navistar Inc. is settling Clean Air Act violations with the U.S. Justice Department by paying a $52 million fine and destroying old engines to prevent oxides of nitrogen (NOx) pollution from fouling the atmosphere.
Navistar, now a subsidiary of Volkswagen AG’s Traton Group, has borne the burden of deciding against using the selective catalyst reduction (SCR) form of emissions control that other truck makers adopted following tougher pollution rules going into effect in 2010.
In the Justice...