As a result of human social and economic activities, any material that has reached the end of its useful life and is harmful to nature is called waste. Some of these wastes (plastic, metal, paper, glass, etc.) can be recycled by subjecting them to physical and chemical processes. Simply put, the periodic inclusion of reusable materials in the consumption process is called recycling.

The main purpose of this process is to prevent the overuse of natural resources and prevent environmental pollution. The re-consumption of materials such as aluminum, copper, plastic, paper, rubber, glass, electronic waste will prevent the depletion of natural resources. For example, recycling used paper not only reduces air and water pollution, but also significantly eliminates the felling of new trees. Recycling a ton of waste paper prevents the cutting of 8 trees.

The main difference between recycling and production is that the number of industrial processes is much smaller. This, in turn, saves a lot of energy. In the case of metals, in the recycling process, the waste is directly melted and turned into a new product. Thus, neither the ore used for production nor the steps used to clean the stomach are required. In this way, about 95% energy savings are obtained by recycling an aluminum box.

Recycling is an effective economic investment in long-term planning. The rapid depletion of natural resources in the future indicates serious economic problems. Recycling will provide new employment opportunities for future generations to benefit from the world's natural resources.

As mentioned above, one of the goals of recycling is to reduce the amount of waste that can be disposed of and thus prevent environmental pollution. Pollution of land and water, in turn, contributes to the pollution of agricultural products. This, in turn, has a negative impact on human health and increases health care costs. Consequently, it is possible to reduce health care costs through the recycling process.