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For life without man made plastic, yes it is possible with lesser progress in civilization. Without plastic, we would have hard time finding alternative replacement for electronics wiring, print and cases. It is very likely our life at best would be similar to those live in 1900. We still can grow crop, we still can made a lot of mechanical instrument. It will be little hard developing simple electrical appliance but it can be done.

For life without any hydrocarbon polymerization, no it is not possible. DNA, protein and our cells made from polymers and without such, life wouldn't exist.

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12y ago

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