Do we eat a credit card's worth of microplastic each week?
The claim we all swallow 5.5 grams of microplastic each week \u2013 the same as the weight of a credit card \u2013 has been repeated by charities, newspapers and the World Economic Forum.
But when you understand how this number was calculated, and the range of possible answers for the amount of plastic you eat, you might not want to repeat it yourself.
Professor Jamie Woodward from the University of Manchester explains what\u2019s what.
Presenter: Kate Lamble\nProducer: Beth Ashmead Latham\nResearcher: Ajai Singh \nSeries producer: Tom Colls\nProduction co-ordinator: Katie Morrison\nSound mix: Giles Aspen\nEditor: Richard Vadon