Produced from crude oil, drilled from earth & ocean floor.
Millions of years ago remains of plant and animal bodies decomposed & under intense pressure & high temperatures under earth they transformed into oil.
Hence oil is also called fossil fuel. This oil contains hydrocarbons.
This oil is refined and produces diesel, heating oil, petrol & various type of plastic as below:-
PET or PETE - Polyethylene terephthalate - used for mineral water, soda.
HDPE = High density Polyethylene - used for shopping bags
Polystyrene - used for plastic plates, spoons, cups.
Polypropylene - used for syringes
PVC - Polyvinyl chloride - popular in pipes & plumbing as they are cheaper than metal pips & more durable.
Teflon, Nylon, Polyester are also other types of plastics.