酸化 さんか炭素 たんそ削減 さくげん義務 ぎむじゃなかった
nisankatansosakugengimujanakatta

Noun
Da Copula

The past negative form of 二酸化炭素削減義務

1. Wasn't obligated to reduce carbon dioxide.; Wasn't required to reduce carbon dioxide.

Past/Perfective
Negative