Pollution caused by the reaction of unsaturated and saturated hydrocarbons, aromatics, and aldehydes (emitted owing to the incomplete combustion of fuels) with light. It causes eye irritation.
PHOTOCHEMICAL AIR POLLUTION

Pollution caused by the reaction of unsaturated and saturated hydrocarbons, aromatics, and aldehydes (emitted owing to the incomplete combustion of fuels) with light. It causes eye irritation.