他们破坏环境用英语怎么说

"They are damaging the environment" 或 "They are causing harm to the environment" 是表达他们破坏环境的常用说法。
其中 "damaging" 是动词，意思是破坏或损害，而 "harm" 是名词，意思是伤害。
下面是一些例句：
The factory's emissions are damaging the air quality in the surrounding area.
The company's clear-cutting practices are causing harm to the local ecosystem.
The oil spill is having a devastating effect on marine life and damaging the coastal environment.
They have been accused of damaging the environment by building a new road through the rainforest.
这些句子中都用到了上述表达方式，在这些句子中都是指他们正在对环境造成伤害。