Sir, there are some modified sentences below. I wanna say if the problem which result from animal's slaughter exerts an adverse impact on human beings, then economy prosperity ( from anmial's manufacture) would be useless. ( if human cann't survive on the globe) 555, I lost my confidence a little now.
Do you mind i give you some standard essays in my test ? And then you can judge my level. I'll paste them in billboard. But you don't need to correct them. Just balance a level. It's enough. Thanks again. And I'm sorry for continuing to disturb you .

"However, provided that the slaughter of animals causes serious problems for mankind to survive, like food chain being destroyed, such economical benefits would be meaningless for human. "