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.

摘要废弃是人类自身需要的产，如籽饼来自籽取，果渣来自水果取汁，鸡粪来自规模化养鸡。