In reply to: Burning plastic is very efficient. The stuff is "solid ... posted by Barney68
I know, very few plastics are compostable. The problem is that the molecules are long and composting really only attacks the ends of the chain. Thus it takes a very long time for the entire molecule to degrade.
There are bioplastics but, as far as I know, they don't offer much improvement in this area as it is the length of the molecule that matters and it's long molecules that give most plastics their strength.