Carbon-based chemical pollutants that react with nitrogen and oxygen in the air in the presence of sunlight to form ozone. It has been shown that excessive ozone concentrations in the lower atmosphere [..]

verb Definition: to move at a speed that is not quite running but is faster than jogging Word History: trying to describe not running but not jogging eitherExample Sentence: I am just going to rog, so that I don't run out of breath halfway through the course.

Reactive Organic Gases are volatile organic compounds (VOC) or hydrocarbons (HC) that contribute to smog.

A reactive chemical gas, composed of hydrocarbons that may contribute to the formation of smog. Also sometimes referred to as Non-Methane Organic Compounds (NMOCs).