Factories are no longer allowed to pollute the air with black smoke.
不再允许工厂的黑烟污染空气了。
Our water supply is becoming polluted with nitrates.
我们的水源正受到硝酸盐的污染。
Parents are afraid that their children's minds will be polluted with the violence that they see on television.
父母担心电视上的暴力行为会对孩子产生精神上的污染。