Definitions for "Ground-level ozone"
colourless gas formed from chemical reactions between nitrogen oxides and hydrocarbons in the presence of sunlight near the earth's surface.
Ozone (O3) that occurs near the surface of the Earth. In pollution it causes concern because of its toxic effects.
Secondary ozone pollution, formed through photochemical processes in the atmosphere at the presence of nitrogen oxides, volatile organic compounds and sunlight.
Product of reactions during combustion of coal, gasoline and other fuels and chemicals.