How can nitrogen oxides be removed or reduced?

Nitrogen oxides are a common gaseous pollutant found in the exhaust from equipment that burns fuels at high temperatures like car engines of industrial heaters. They contribute to acid rain, participate in ground level ozone formation or directly injure plants.

They can be minimized by removal systems like the catalytic treatment provided in automobiles or wet scrubbers and other treatments at industrial sites. They can be reduced by the control of temperature and pressure in larger heaters and the proper control of air and fuel types.