A research team has fully characterized a key chemical reaction that affects the formation of pollutants in smoggy air in the world's urban areas. When applied to Los Angeles, the laboratory results ...

Nitric acid and ammonia are the two important reactive forms of nitrogen, which are widely used in human life and production. In 2017, the worldwide production of HNO3 and NH3 was estimated to be 50 ...

PASADENA, Calif.—A team of scientists led by researchers from the California Institute of Technology (Caltech) and NASA's Jet Propulsion Laboratory (JPL) have fully characterized a key chemical ...

Because nitric acid is stable, long-lived, and not photochemically reactive, it’s long been thought to be the final destination for reactive nitrogen species in the atmosphere. But those assumptions ...

Acid rain went from being a pollution disaster to an environmental success story. How did scientists manage to prove that acid rain existed, and find a way to stop it? A group of kids canoeing in ...