So, first of all, the environment pollution, well, that's not a good collocation.

首先，environment pollution，这不是一个好的搭配。

We may say " air pollution" , " noise pollution" , " traffic pollution" , but not " environment pollution" .

我们可以说 “air pollution”、“noise pollution”、“traffic pollution”，但不说 “environment pollution”。

They said loss of forests, human exploitation of the environment, pollution, and climate change were the biggest causes of the loss.

他们表示，森林流失，人类对环境的开发，污染以及气候变化是动物数量减少的最大原因。

And if the student had learned the word family: " environment" , " environmental" , the adjective, then, yes, that can be used, but not the " environment pollution" .

“environment” ，“environmental” 这个形容词，那么，是的，可以用，但不能用“environment pollution”。

We have reduced emission of air pollutants in recent years, but cars are still a major source of air pollution. The situation has been improved a lot as stricter environment pollution laws have been introduced.

我们这些年也在减少有害气体排放量，但是汽车尾气排放依然是空气污染的主要原因。随着环境保护法的颁布，环境状况已得到了极大的改善。