In practice, we certainly dont (http://2.bp.blogspot.com/_PzJdv4K9pOY/TNpvMuWL58I/AAAAAAAAA6c/2rIys1k-AuA/s1600/12580832.jpg http://2.bp.blogspot.com/_PzJdv4K9p

In practice, we certainly dont (http://2.bp.blogspot.com/_PzJdv4K9pOY/TNpvMuWL58I/AAAAAAAAA6c/2rIys1k-AuA/s1600/12580832.jpg http://2.bp.blogspot.com/_PzJdv4K9pOY/TNpvMuWL58I/AAAAAAAAA6...) store the waste in a way so we know for sure it will not be used to fertilize the crops of future generations.