柯林斯詞典greenhouse gas (greenhouse gases) 1. N-VAR Greenhouse gases are the gases which are responsible for causing the greenhouse effect. The main greenhouse gas is carbon dioxide. 溫室氣躰 返回 greenhouse gas劍橋詞典a gas that causes the greenhouse effect , especially carbon dioxide 溫室氣躰（尤指二氧化碳） 返回 greenhouse gas