This story appears in the July 26 print edition of Transport Topics. Navistar Inc. attacked competitors’ 2010 engines on two fronts last week, telling environmental regulators that pollution controls ...

Selective catalytic reduction (SCR) for NO x removal from utility boilers has been shown to have extremely high removal efficiencies. In recent years, there has been increased focus on a potentially ...

“The installation and operation of SCR is estimated to increase the electricity bill for the average Arizona Public Service residential customer by about 70 cents per week,” the EPA said. Though it ...