Answer:
An action done on mosquito bites
I have cities with no people forests with no trees and oceans with no water.
With three eyes and as black as night I frequently knock down ten men with a single strike!
I am brown and sticky
I am a seed with three letters in my name. Remove the last two and I still sound the same. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.