Plastics are synthetic materials made from oil and natural gas.
We use plastics a lot in our everyday lives. Different plastic bottles are made from different types of plastic. A pop bottle is made from Polyethylene Terephthalate, called PET or Code 1. Milk jugs are made from High Density Polyethylene, called HDPE or Code 2. Code 1 and Code 2 are most commonly recycled to make new items.