Are you asking what the four main categories of garbage are? Recyclable, food waste, hazardous and non-recyclable. According to the query industry wikipedia information released by the display can be learned, the four major categories of garbage is recyclable garbage, food waste, hazardous and harmful garbage and non-recyclable garbage, kitchen waste refers to the catering industry units, enterprises and institutions, schools, canteens and other food residues and waste, commonly known as slop feet, recyclable garbage is not seriously tarnished with the text of the paper, packaging paper and other paper products, etc., waste containers of plastics, packaging plastic and other plastic products.