The composting and other reuse of biodegradable waste-such as food and garden waste-is also a form of recycling. Recyclable materials include many kinds of glass, paper, cardboard, metal, plastic, tires, textiles, batteries, and electronics. There are some ISO standards related to recycling, such as ISO 15270:2008 for plastics waste and ISO 14001:2015 for environmental management control of recycling practice. It promotes environmental sustainability by removing raw material input and redirecting waste output in the economic system. Recycling is a key component of modern waste reduction and is the third component of the " Reduce, Reuse, and Recycle" waste hierarchy. It can also prevent the waste of potentially useful materials and reduce the consumption of fresh raw materials, reducing energy use, air pollution (from incineration) and water pollution (from landfilling). It is an alternative to "conventional" waste disposal that can save material and help lower greenhouse gas emissions. The recyclability of a material depends on its ability to reacquire the properties it had in its original state. The recovery of energy from waste materials is often included in this concept. Recycling is the process of converting waste materials into new materials and objects.
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