Over the past four years, the Environmental Protection Agency has tightened restrictions on a host of pollutants and pollution sources, ranging from tougher tailpipe emissions standards for all ...

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 ...

Nitrogen is an essential element for living organisms, needed to build DNA, proteins and chlorophyll. Although nitrogen makes up nearly 80% of the air we breathe, it’s availability to plants and ...

An international team of researchers has found that nitrogen emissions from fertilizers and fossil fuels have a net cooling effect on the climate. But they warn increasing atmospheric nitrogen has ...

Industry produces gases that are harmful to both humans and the environment and therefore must be prevented from escaping. These include nitric oxide and nitrous oxide, the latter also known as ...