Najis
Yes, as it would be negating the guidance of nature. This is also a Deen inculcated in us and this is the Straight Path as termed by the Quran: continue to point your face [like your father Abraham] towards his religion. Follow the nature created by God [O Prophet!] on which He has created people. This nature created by God cannot be changed. This only is the straight path but most people know not. (30: -30)
It means one should follow the natural and should not violate it’s dictations.