**Abstract**

Polyethylene (PE) is a synthetic polymer made from the polymerization of ethylene. It is the most widely used plastic in the world. Its production, processing, usage, applications, and disposal system had made the study of this plastic very significant. The role played by this plastic in the world has made the knowledge of its usage, disposal system, processing, recycling, and applications inevitable. The chapter discussed the general overview of this plastic product, the production, properties, and disposal systems. The processing of recycled polyethylene is vital in its end-use through collecting, sorting, cleaning, separation, and compounding, and this was extensively treated. We also discussed the opportunities, applications, and limitations of polyethylene recycling. At the end of this chapter, one will know the production, processing, recycling, and applications of polyethylene plastic and the dangers posed by this plastic if a proper disposal system is not followed.

**Keywords:** disposal, high-density polyethylene, low-density polyethylene, monomer, polymers, recycling, resin
