I never knew the symbol was created by the plastics industry.
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,
https://en.wikipedia.org/wiki/Polylactic_acid
can be made from biological sources, is compostable and chemically recyclable.
https://en.wikipedia.org/wiki/Organic_compound#Modern_classi...:
“The modern meaning of organic compound is any compound that contains a significant amount of carbon—even though many of the organic compounds known today have no connection to any substance found in living organisms. The term carbogenic has been proposed by E. J. Corey as a modern alternative to organic, but this neologism remains relatively obscure.”
https://en.wikipedia.org/wiki/Plastic:
“Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Plastics are also considered organic materials, like wood, paper, or wool.”