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Recycling is the reprocessing of materials into new products. Recycling prevents useful material resources being wasted, reduces the consumption of raw materials and reduces energy usage, and hence greenhouse gas emissions, compared to virgin production.[1] Recycling is a key concept of modern waste management and is the third component of the waste hierarchy. Recyclable materials, also called "recyclables" or "recyclates", may originate from a wide range of sources including the home and industry. They include glass, paper, aluminium, asphalt, iron, textiles and plastics. Biodegradable waste, such as food waste or garden waste, is also recyclable with the assistance of micro-organisms through composting or anaerobic digestion. Recyclates need to be sorted and separated into material types. Contamination of the recylates with other materials must be prevented to increase the recyclates value and facilitate easier reprocessing for the ultimate recycling facility. This sorting can be performed either by the producer of the waste or within semi- or fully-automated materials recovery facilities. There are two common household methods of helping increase recycling. In curbside collection (UK: kerbside collection) consumers leave presorted materials for recycling in front of their property, typically in boxes or sacks to be collected by a recycling vehicle. Alternatively, with a "bring" or carry-in system, the householder may take the materials to collection points, such as transfer stations or civic amenity sites, where recyclates are placed into recycling bins based on the type of material. Recycling does not include reuse where items retain their existing form for other purposes without the need for reproducing...

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