You seem to be directly contradicting your parent commenter about US releasing plastic into the sea. Even if it's growing, do you still agree that it's insignificant compared to less developed countries?
A lot of the arguments against plastic miss this anyway. They say "don't put it in the landfill" but the landfill is exactly where it's walled-off and safe. If it was about getting into waterways, it'd be "Put your plastic in the landfill instead of the street".
Why does it matter how long it takes to break down? As long as it's secure, it'll just sit there doing no harm. Is there any evidence that landfills will one-day release their contents on a large scale and cause an environmental problem? Presumably that will happen in some post-apocalyptic world where people no longer bother to maintain things and the apocalypse will be tolerable but not the plastic?
A lot of the arguments against plastic miss this anyway. They say "don't put it in the landfill" but the landfill is exactly where it's walled-off and safe. If it was about getting into waterways, it'd be "Put your plastic in the landfill instead of the street".
Why does it matter how long it takes to break down? As long as it's secure, it'll just sit there doing no harm. Is there any evidence that landfills will one-day release their contents on a large scale and cause an environmental problem? Presumably that will happen in some post-apocalyptic world where people no longer bother to maintain things and the apocalypse will be tolerable but not the plastic?