国連 こくれん人間 にんげん環境 かんきょう会議 かいぎだったら
koku renningenkankyōkaigidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 国連人間環境会議

1. If it were the UN Human Environment Conference; If the UN Human Environment Conference happened

Tara Conditional