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The recycling process is understood as a transformation of metal (or other material), arrived at the end of its life cycle, reusable in other raw metal into new products. It is a process that spreads mainly in the second half of last century, in the face of economic and ecological requirements: reduced energy costs and saving the planet's natural resources. The secondary raw materials are the scraps of raw materials or materials that derive from the recovery and recycling of waste. The advantage of using secondary raw materials for the production of metal is to save energy than the extraction from the mine. In addition to paesei with few natural resources such as raw materials, a mine may be the only metal at low cost.
Difference between recycling and reuse of glass: this is reuse!
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