Question

what do they mean?? ​

Answer 1

Answer:

It means that the origin of the materials that are used to make synthetic fibres are callee petrochemicals

Explanation:

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Answer 2

Answer:

Petrochemicals (also known as petroleum distillates; and sometimes abbreviated as petchems) are the chemical products obtained from petroleum by refining. ... Oil refineries produce olefins and aromatics by fluid catalytic cracking of petroleum fractions.

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