evidence: A spot of tea… And some plastic? You’d probably be surprised to learn that most tea bags contain up to 25% plastic. In fact, we didn’t know about plastic in tea bags until we watched a viral BBC video about tea production in 2017. [...] Canadian researchers published a study in the American Chemical Society’s Journal of Environmental Science and Technology which found that steeping a single plastic tea bag at brewing temperature releases about 11.6 billion minuscule particles known as "microplastics" and 3.1 billion "nanoplastics" into each cup (source). [...] It may be hard to believe, but most brands of bagged tea contain plastic. With millions upon millions of cups consumed daily, this adds up to a lot of plastic.