求助應該給出上下文，否則自己從詞典直接查就是了，何必求助？
CO2-neutral從字面上看是對CO2惰性，即不與二氧化碳反應或改變它的性質

CO2-neutral 又叫carbon neutral， 對的，不是carbon dioxide neutral。
carbon neutral, also called carbon neutrality is a term used to describe the action of organizations, businesses and individuals taking action to remove as much carbon dioxide from the atmosphere as each put in to it. The overall goal of carbon neutrality is to achieve a zero carbon footprint.
換成中文簡單的說，叫二氧化碳零排放這項措施，意在減少大氣層中二氧化碳的含量，已到達最終二氧化碳零排放的目的。這是個專有名詞，