The main technology of selective catalytic reduction of nitrogen oxides uses ammonia as a reducing ... are important to understand how detailed structure and composition influence performance ...

Some environmental and health advocates praised the standards but others said they don’t go far enough to curb nitrogen oxide, which can cause issues including respiratory illness ...

Nitrogen oxides, a group of gases from the burning of fossil fuels, is linked to a range of health effects. By Austyn Gaffney A rule proposed by the Environmental Protection Agency on Friday could ...

DETROIT (AP) — In a little over four years, new heavy truck makers will have to cut harmful nitrogen oxide pollution more than 80% under new standards released Tuesday by the U.S. Environmental ...