首先订正一下错误，此句应该是：

Environmental pollution is becoming increasingly severe with the progress and development of the human society.

这句话的意思是:随着人类社会的进步与发展，环境污染变得日益严重。

severe是形容词，需要副词修饰。

主语是environmental pollution ；become是系动词，使用进行时表达循序渐进的过程；severe是表语。with the progress and development of the human society做伴随状语。