The formation of photochemical smog involves which of the following?

Photochemical smog forms when sunlight drives reactions among nitrogen oxides and volatile organic compounds to create ground-level ozone.

Volatile organic carbon supplies the reactive hydrocarbons that feed the smog-forming chain.

Sunlight provides the ultraviolet energy that triggers the photochemical reactions.

Nitrogen dioxide splits under light to release the oxygen atoms that build ozone.

Carbon dioxide is a stable greenhouse gas that plays no part in smog formation.

Methane is a slow-reacting greenhouse gas rather than a direct smog precursor.

The resulting brown haze peaks on warm sunny afternoons in traffic-heavy cities.