All the cost/energy benefits listed are exactly the type of short term business arguments that enabled companies like Coca-Cola to transition from glass bootles to producing 110 _billion_ PET bootles, every, single, year. [0]
There are a number of long-term costs not captured in these business decisions:
- The energy cost of recycling a PET bottle is much greater than producing a brand new one from crude oil. This creates the wrong kind of incentives for recycling
- Plastic degrades everytime it is recycled. Google plastic "downcycling". In an ideal circular economy old plastics would still have to be replaced with "new" crude oil plastic with additional energy and emissions costs.
- The cost of plastic collection and _sorting_ (which manufacturers aren't paying for)
- The environmental and disposal costs of unrecycled plastic, a PET bottle will take at least 450 years to fully decompose. [1]
- The Health costs of the calamity of micro-plastics contaminating our food supply and ground water. Simply google "plastic endocrine disruptors".
[0] https://www.theguardian.com/environment/2017/oct/02/coca-col...
[1] https://www.nationalgeographic.com/environment/2019/08/plast...