The science behind activated charcoal is nothing new or mysterious. Most water treatment facilities use some sort of activated charcoal in their process, and many home water filtration systems, including those name brand filtering pitchers, have charcoal filters.
Everything mankind has EVER made from plastic still exists, and it’s not going anywhere. Plastic is now in the deepest parts of the oceans, in the dust in our homes, in the bottled water that we purchase, and in the foods that we eat. Every time we wash our clothes microfibers enter our water systems, every time we drink bottled water we add to a landfill.