What does it mean when that bit of plastic you're throwing out is labelled biodegradable?
The Environment Commissioner says consumers are confused and it means we're probably not disposing of plastics correctly.
Simon Upton says there are a lot of claims about how products break down - but people don't know what to do or what to believe.
"The Government, working with industry, should sit down and get the terms clear so we know what something means when it says it is biodegradable or compostable."
He says we could adopt international standards to regulate the labels on our plastic products.
"You could say something is certified as biodegradable or certified as compostable so we know what's in them, we know how they break down, we know what they break down into."
LISTEN TO SIMON UPTON TALK WITH ANDREW DICKENS ABOVE