残留 ざんりゅう せい有機 ゆうき汚染 おせん物質 ぶっしつであれば
zan ryūseiyūki osembusshitsudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 残留性有機汚染物質

1. If it is a persistent organic pollutant.; If it were a persistent organic pollutant.

Ba Conditional