The recycling numbers are problematic in many ways.<p>One of them is that any new plastic, which could be superior in degradation recyclability, will inevitably be put into group 7 together with the thermosets. For instance,<p><a href="https://en.wikipedia.org/wiki/Polylactic_acid" rel="nofollow">https://en.wikipedia.org/wiki/Polylactic_acid</a><p>can be made from biological sources, is compostable and chemically recyclable.