pollutant

/pəˈlutənt/

waste matter that contaminates the water or air or soil

中文释义：污染物

Factories should reduce the amount of pollutants they release into the air.

工厂应减少排放到空气中的污染物数量。

Water pollutants like heavy metals can harm aquatic life and human health.

重金属等水污染物会危害水生生物和人类健康。