Yes, to the rebuttal of: "do practitioners not distinguish between naturally-occurring polymers and synthetic plastics in this kind of microplastic/nanoplastic

Yes, to the rebuttal of: "do practitioners not distinguish between naturally-occurring polymers and synthetic plastics in this kind of microplastic/nanoplastic research" The quote you provided explains clearly, they measured three different types of teabags, distinguished by the different material that each was made of. "three teabags of different chemical compositions" Edit: to indicate agreement