In ______________,many kinds of waste materials are collected and used as raw materials in the production of new products.

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Recycling involves the collection and processing of waste materials such as paper, plastics, glass, and metals, and their conversion into new products. This reduces the demand for virgin materials, conserves natural resources, and helps to reduce pollution and waste. Composting involves the decomposition of organic wastes into a soil-like material that can be used as a fertilizer, while biodegradation involves the breakdown of organic compounds by microorganisms. Sanitary landfills are sites for the disposal of solid waste that have been treated to minimize environmental impacts, but do not involve the recycling or reuse of waste materials.

In ______________,Many Kinds of Waste Materials Are Collected and Used