]]]]Waste, rubbish, trash, garbage, or junk is unwanted or undesired material. "Waste" is the general term; though the other terms are used loosely as synonyms, they have more specific meanings: rubbish or trash are mixed household waste and including paper and packaging; food waste or garbage (North America) is kitchen and table waste; and junk or scrap is metallic or industrial material. There are other categories of waste as well: sewage, ash, manure, and plant materials from garden operations, including grass cuttings, fallen leaves, and pruned branches. Though the cleanliness of public streets has long been a public responsibility, it was only towards the end of the 19th century that waste collection and disposal began to be considered part of the public health and sanitation function of municipalities. Some components of waste can be recycled once recovered from the waste st