こう化学 かがくスモッグじゃありませんでした
kōkagakusumoggujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 光化学スモッグ

1. Was not photochemical smog.; It was not photochemical smog.

Past/Perfective
Negative
Polite
Terminal Form