Oil companies (which are also plastic companies) have worked hard for
decades to make the public think that used plastic products would be
recycled if we handed them in, knowing this was not true, so that we
would buy and discard plastic without hesitation.
Most of what we hand in goes into landfill because recycling it is not
feasible.
Did they know, decades ago, that plastic products would damage wild
animals and ecosystems?
Perhaps not. (It would be interesting to investigate what they knew
about this and when.) In any case, we know it now. We must reduce
drastically the amount of plastic waste that does not in fact get
recycled, so we do not leave our planet full of toxin dispensers.