pollutant

n. /pəˈluːtənt/ B1

污染物；污染源

A substance that makes air, water, or soil dangerously dirty.

仙境例句

The King called the Queen's shouting a pollutant, for it spoiled the fresh garden air.

国王说王后的喊叫是一种污染物，因为它弄脏了花园里清新的空气。