51
Upcycled plastic can be turned into soap, researchers find
(scrippsnews.com)
Subscribe to see new publications and popular science coverage of current research on your homepage
Well they literally say there's none left. Their comment wasn't condescending. You kind of just asked a dumb question.
Not a dumb question at all. It's completely reasonable to want to know if there will be microplastics left over in the process.