What Is The Evil Quartet Which Is A Threat To Biodiversity?

The Evil Quartet speaks of four factors that impact on the environment that lead to biodiversity loss. They are:
1) Habitat Destruction
2)Pollution
3) Introduction of Exotic Species
4) Over-exploitation

Well, look mate. I'm not being funny or anything and to be totaly honset with you lers go becuse I'll shank you up mursh and I'm the evil quatet . You heard you fagot

Well, look mate. I'm not being funny or anything and to be totaly honset with you lers go becuse I'll shank you up mursh and I'm the evil quatet . You heard you fagot