If plastic was made in 1907 how do they know it may take up to 1000 years to decompose?

Question

If plastic was made in 1907 how do they know it may take up to 1000 years to decompose?

In: Chemistry

Answer 1

I read a comment about a plastic engineer that said that plastic doesn’t take up to 1000 years to decompose. May have been bullshit.

He said something like the stabilizers that help the plastic not break down don’t take up that much to decompose.