A chemistry professor is working with dentists in Yorkshire to cut down on the amount of single-use plastic used during appointments.
Tony Ryan, a professor of polymer chemistry at the University of Sheffield, has worked with plastics all his life and is leading a research project looking at how dentists could make better use of it.
He is working with industry professionals, including Dr Steve Mulligan, an NHS dentist in Rotherham.
You can see this story in full on BBC Inside Out Yorkshire and Lincolnshire at 19:30 GMT on BBC One on Monday 2 September, or via iPlayer for seven days afterwards.
