Supermarkets & brands are often criticised for how much plastic packaging they use, but could removing that from some food products actually increase their environmental impact? In this first episode of Which? investigates Greg Foot uncovers quite how much unrecyclable plastic there is, checks out whether refillables and ‘compostables’ really do help the planet, and unwraps the surprising facts around what plastic could - or perhaps should - stay on the shelves.   See acast.com/privacy for privacy and opt-out information.