Co-op develops a fully biodegradable paper tea bag   MANCHESTER, UK, 2018-Jan-31 — /EPR Retail News/ — The Co-op is brewing up a fully biodegradable paper tea bag, making it the first retailer to find a solution to the problem of plastic waste caused by the nation’s favourite beverage. The convenience retailer’s famous own-brand 99 tea will be developed without polypropylene,…