Question

What is mean by evil quartet?

Answer 1

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

Answer 2

The major causes that are responsible for the loss of Biodiversity is described or called as ‘The Evil Quartet’. The following are the four factors impacting the environment that leads to the loss of Biodiversity:

1.    Habit Loss and Fragmentation

2.    Over- Exploitation

3.    Co-extinctions

4.    Invasion of Alien species