Question

1. Who are the friends of the Earth?
2. Who/what needs protection in the world?
3. What are the nasty side-effects of polluted air, land, and water?​

Answer 1

Answer: 1. The nature: trees, oceans, plains, humans, etc.

              2. The nature needs all the protection, more precisely the Earth.

              3. People will most likely run out of oxygen because of polluted air, not everyone will have water to drink, and the earth won't be good to plough.

I hope I helped you!