Answer:
I have cities without people forests without trees and oceans without water. What am I?
I save lives on the ground and in the air
I contain five little items of an everyday sort. You can find all five in a tennis court.
You throw me out when you want to use me, but take me in when you donβt want to use me. What am I?
Tear me off and scratch my head what once red is now black.
I will disappear every time you say my name.