Recycling - what is it for?
The most common secondary, tertiary, etc. in processing or a different scale of materials such as glass, paper, aluminum, asphalt, iron, and various kinds of cloth plastic.
The value of recycling is huge.
First, the resources of many materials on Earth are limited and may not be filled in time comparable to the lifetime of the human civilization. Second, once in the environment, the materials usually become pollutants.
Thirdly, waste and finished their lifecycle are often a cheaper source of many substances and materials than natural sources.
Many people know the expression that "the rich are rich because they prefer not to spend, but save." Perhaps it is not too far from the truth. To date, the number of the many resources on this planet is limited, and to talk about their recovery is not meaningful. Such technologies to date, no. In this case, re-use of many materials today are much more profitable than their initial processing.
For recycling all waste must be sorted out. To do this you need to create the conditions that can arouse the interest of the citizens to sort waste.
The use of recycled materials as a new resource base - one of the fastest growing areas of materials processing in the world. However, interest in obtaining cheap resources, which are secondary raw materials, is very noticeable.
A variety of different waste can be recycled. For each type of raw material is the technology of processing.