Question

In Eco Systems what can be helpful or harmful depending on point of view

Answer 1

We can quote many examples for such things which are helpful or harmful depending on point of view or situation or amount etc.

a) Bacteria : they can be helpful for fermentation process used in manufacturing of many useful things (like beverages) and can be harmful as they cause rotting of many useful things

b) Beaver : it is one of the largest rodent on earth. It is harmful as it causes cutting of trees. It lives upon them.

However, it a natural dam builder. It has a tremendous power to swim or float in water.

It can create canals naturally.

But for living purpose it feeds upon trees and cause destruction of trees and thus forest.