I'm not so sure this is the case regarding paper straws/cups. At least regarding paper cups, they do not involve paper alone but some addition of plastics (extr

I'm not so sure this is the case regarding paper straws/cups. At least regarding paper cups, they do not involve paper alone but some addition of plastics (extra hardness and plasticity, avoiding water soaking). I suspect it's the same for straws as the same reasons apply. So this measurement is likely a result of production and not outside pollution.