Question

Why are plastic wastes not biodegradable?​

Answer 1

Explanation:

According to Peters, it's because the carbon-carbon bonds in polypropylene require too much energy to make, so nature chooses other alternatives for holding together large molecules. ... Unfortunately, while peptide bonds would produce plastics that biodegrade, they would also have a very short shelf life.

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Answer 2

Explanation:

Because plastics are not decomposed under the earth crust.