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greenhouse effect gas; greenhouse gas
温室効果ガスの排出を減らす。
Reduce greenhouse gas emissions.
二酸化炭素は代表的な温室効果ガスだ。
Carbon dioxide is a typical greenhouse gas.
温室効果ガスの削減は気候変動対策の中心課題だ。
Reducing greenhouse gases is the central challenge in addressing climate change.