pollutant

/pəˈlutənt/

waste matter that contaminates the water or air or soil

Chinese meaning: 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。