Incalculable mountains aren't a real environmental problem. People just believe that for some reason. We can just leave them there forever. The actual environmental value in recycling is reducing the CO2 emissions from making new plastic by reducing production of new plastic. I don't know if biodegradable plastic actually helps at all or just placates the people worried about the fake problem of incalculable mountains.
I'm not sure why you have the take that plastic pollution is not a problem. If anything, it is a massive catastrophe that threatens the environment and possibly the human race. Plastic pollution is destroying the environment[1], wildlife[2], and damaging humans[3][4]. That includes newborn babies[5].
I'm talking about plastic waste in landfills ("mountains"). For that, recycling does no good because it's just as likely (or more?) to leak into the environment failing to reach a recycling facility as it is failing to reach a landfill.
