Waste derived from human activitirs, such as rapeseed placentiform from the extraction of rape oil;fruit faeces from the extraction of fruit juice;chicken excrement from the scall farming of chickens.

摘弃是人类为满足身需的产，如菜籽饼油菜籽取油，果渣水果取汁，鸡粪规模化养鸡。