مستخدم:Bilel gorine/ملعب

Recycling "02'

is the process of converting waste materials into new materials and objects. It is an

alternative to "conventional" waste disposal that can save material and help lower greenhouse

gas emissions. Recycling can prevent the waste of potentially useful materials and reduce the

consumption of fresh raw materials, thereby reducing: energy usage, air pollution (from

incineration), and water pollution (from landfilling).

Recycling is a key component of modern waste reduction and is the third component of the

"Reduce, Reuse, and Recycle" waste hierarchy. [1][2] Thus, recycling aims at environmental

sustainability by substituting raw material inputs into and redirecting waste outputs out of the

economic system. [3]

There are some ISO standards related to recycling such as ISO 15270:2008 for plastics waste

The three chasing arrows

of the international

recycling logo

and ISO 14001:2015 for environmental management control of recycling practice.

Recyclable materials include many kinds of glass, paper, cardboard, metal, plastic, tires, textiles, and electronics. The composting or

other reuse of biodegradable waste—such as food or garden waste—is also considered recycling. [4] Materials to be recycled are

either brought to a collection center or picked up from the curbside, then sorted, cleaned, and reprocessed into new materials destined

for manufacturing.

In the strictest sense, recycling of a material would produce a fresh supply of the same material—for example, used office paper

would be converted into new office paper or used polystyrene foam into new polystyrene. However, this is often difficult or too

expensive (compared with producing the same product from raw materials or other sources), so "recycling" of many products or

materials involves their reuse in producing different materials (for example, paperboard) instead. Another form of recycling is the

salvage of certain materials from complex products, either due to their intrinsic value (such as lead from car batteries, or gold from

circuit boards), or due to their hazardous nature (e.g., removal and reuse of mercury from thermometers and thermostats).

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