If you have kids, do you let them come into your house completely covered in dirt?
If I didn't then they wouldn't come back in... if I do will that destroy an ecosystem, or make agriculture difficult?
Why do you keep your house clean?
Well if you ask my wife, I don't. To keep people healthy would be a reason. The home doesn't have an ecosystem to balance of course. If it did it would be because it was never cleaned.
