Answer:
I get paid to shoot people then blow them up.
I go up when the rain comes down
Drop me and the world will shatter. You can always find me where you empty your bladder. What am I?
What is black when you buy it, red when you use it, and gray when you throw it away?
I am flora not fauna. I am foliage not trees. I am shrubbery not grass.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.