对环境自净能力的理解,正确的是( ) A.环境的自净能力就是

对环境自净能力的理解,正确的是(  )

A.环境的自净能力就是对人类破坏活动的抵御能力。人类破坏能力越大,环境的自净能力越强

B.由于环境有自净能力,所以不会产生严重的环境问题

C.环境自净能力是有限度的,当人类向环境过量排放污染物、有害物时,环境会永久丧失容纳和清除能力而发生环境问题

D.环境自净能力是环境的自然功能之一,当其对废弃物的容纳能力和清除能力小于排放物数量时,就会产生环境问题

 

答案

D

 

人类新陈代谢和生产、生活消费活动的废弃物要排放到环境中,环境对人类生产和生活中的废弃物具有一定的自净能力,这种环境对人类生产、生活的排泄物具有的容纳和清除能力,叫做环境自净能力。但是环境自净能力是有限度的,当人类向环境过量排放污染物、有害物时,环境会暂时或永久丧失容纳和清除能力而发生环境问题。

 

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