Polyethylene is created by polymerizing ethylene (or ethene) monomer. It is more resistant to heat than other plastics and does not decompose at high temperatures. However it does react with acids and alkalis so should not be placed in plastic containers for food applications. Polythene is a general term given to a group of related organic compounds sharing the characteristic formula CxHyZ. They are made by polymerizing one or more diolefins. In contrast to polyethylene, which is a linear molecule, polythene has a flat, planar structure. It is strong, flexible, and transparent. Although polythene was once believed to be indestructible, it now suffers from degradation caused by sunlight and oxygen, which can cause it to break down over time. In conclusion, polyethene is a type of plastic that is commonly used in trash bags and grocery store wraps. It is very useful because it is durable and retains its shape, but it will degrade over time.