Plastic recycling is the process of converting waste plastic into new materials and objects.

It is an alternative to conventional waste disposal that 

can save material and help lower greenhouse gas emissions. 

There are two main types of plastic recycling: mechanical recycling and chemical recycling. 

Mechanical recycling involves melting down plastic waste and reshaping it into new products. 

This is the most common type of plastic recycling. 

Chemical recycling involves breaking down plastic waste into its 

constituent molecules and then using those molecules to create new plastics. 

This type of recycling is less common than mechanical recycling, 

but it is becoming more popular as new technologies are developed.