Nitrogen Oxides

Vehicle exhaust, power plants, industrial boilers, wildfires; indoors from gas stoves and heaters; high levels in silos and some welding/blasting work [1][2][4].

Breathing outdoor air near busy roads; cooking or heating with gas without good ventilation; at work near combustion or silage [1][2][4].

Short-term exposure can cause coughing, wheeze, and reduced lung function; long-term exposure may contribute to asthma and more respiratory infections; NOx also forms ozone and PM2.5 [1][3].

Children, people with asthma or COPD, older adults, and those living or working near heavy traffic or combustion sources [1][3][4].

Use a vented range hood with gas; maintain appliances; consider electric/induction; ventilate; avoid heavy exercise near traffic; check the Air Quality Index; follow workplace controls and PPE [1][2][4].