The team found that brewing tea in a plastic bag made of polypropylene, a common tea bag material, released over a billion particles per milliliter of tea. Paper tea bags made of cellulose and ...

or a common tea bag material actually released over a billion particle per milliliter of tea. In fact, what we think as the paper bags, made of cellulose and mesh nylon bags also shed millions of ...

Not all tea bags shed them. We asked experts if it’s risky to use the ones that do. Credit...Joyce Lee for The New York Times Supported by By Caroline Hopkins Legaspi Q: I’ve heard there are ...