Ground Level Ozone

Definition

Ground level ozone refers to a harmful air pollutant that forms when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight. It is not emitted directly into the atmosphere but is created through chemical reactions involving pollutants from sources like cars, power plants, and industrial facilities.

Analogy

Imagine ground level ozone as a toxic cloud hovering close to the ground. Just like how fog can settle near the surface, ground level ozone stays low in the atmosphere where we breathe, causing respiratory issues and other health problems.

Related terms

Photochemical Smog: This term refers to a mixture of pollutants including ground level ozone that forms when sunlight reacts with emissions from vehicles and industrial processes.

Nitrogen Oxides (NOx): These are gases produced by burning fossil fuels, primarily from vehicle engines and power plants. They contribute to the formation of ground level ozone.

Volatile Organic Compounds (VOCs): VOCs are organic chemicals that easily evaporate at room temperature. They come from various sources such as paints, solvents, and gasoline vapors. VOCs also play a role in the formation of ground level ozone.