Plus, these plastics still take a lot of energy to produce.
I definitely think that multi-use plastics make the most sense, if we can build the supply chain to get there. Sort of like how old glass milk bottles worked: You left them out and they were collected by the milk man.
0: https://en.wikipedia.org/wiki/Biodegradable_plastic#Home_com...
I think the problem is ultimately the "disposable attitude" of most people, which drove the manufacturers to make them thinner and weaker until they're barely enough for a single use (and also for more profit, of course.) I see biodegradable in the same way as planned obolescence --- the manufacturers can both guarantee that people will keep consuming, while also exclaiming how environmentally friendly they are.
Perhaps most people just don't like reusing things?
So if I can sell you a product in a multi-use container, pass the cost to you, and you decide to throw it away after a single use, that's what's going to happen.
If instead it's more affordable to use compostable plastics or non-plastics (e.g. aluminum), then that's what will be done.
My hunch is with low oil prices and the high cost to manufacture biodegradable plastics, the first path may unfortunately become popular (biodegradable plastics runs for roughly 10x standard plastic.)
This is a hard problem. A ban will not fix it and may have perverse effects like increasing usage and pollution.
What is so damn bad about paper? Paper is mostly renewable (or can be) and is very biodegradable. Why not just make better paper bags
>I thought they're made of renewable lumber and compost better than plastic?
All of which is irrelevant to climate impact. Taking oil out of the ground, turning it into plastic bags, then burying it is carbon neutral, if we ignore the energy required for processing. This is fair because it also takes energy to process pulp to make paper bags. Composting actually causes co2 to be released, so that's actually counterproductive.
The ideal is a closed carbon loop, and the primary blocker here is the continued use of oil, coal, and gas.