Question

The main source of plasty is

Answer 1

Answer:

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Explanation:

crude oil

The main source of synthetic plastics is crude oil. Coal and natural gas are also used to produce plastics. Petrol, paraffin, lubricating oils and high petroleum gases are bi-products, produced during the refining of crude oil. These gases are broken down into monomers

Answer 2

Answer:

Z - shaped incisions

Explanation:

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