In a scientific first, researchers have turned plastic waste into a mainstay treatment for Parkinson's disease (PD). In a proof-of-concept study, researchers used engineered bacteria to convert polyethylene terephthalate (PET) -- a widely used plastic found in bottles and food packaging -- into levodopa (L-DOPA).

Big changes are coming to how the UK recycles, but here's what you should know in the meantime.