Ok lets see, so if we did away with combines people would stop griping about the animals being killed by them ever harvest season. But then what about the animals killed by cars and things of that nature? Should we do away with the mechanics all together and regress back to a state of slave labor in the fields and ox and cart for travel?
Look we all have to just deal with the fact that alot of our choices screw up the surroundings of our world. If you dont wanna deal with it, become amish and move on.