No, but the most pressing problem is still the carbon emissions, especially in a situation where the waste goes into a capped landfill like the above, as opposed to if it were in a country with uncovered landfills or high levels of material being "lost" to nature on the way to a landfill.

If it's the old pvc based stuff then it should sink, looking a lot like a jellyfish as it does. So it probably wouldn't been eaten a few times by now. Unless it went to a properly capped landfill, which was probably fairly common in 1996 in the US, in which case it's still there and maybe still usable.

Maybe 3kg for the full roll? In which case that's similar emissions-wise to ~300g of beef, or driving 100 km. Though spread over so many decades it's pretty insignificant compared to all the other pollution we emit.