Tea lovers, this information might interest you. Researchers at the Canadian university McGill have revealed the presence of plastic in micro or nanoscopic form, released by some tea bags when immersed in boiling water at the time of infusion. The pouches concerned are those produced with nylon and polyethylene terephthalate (PET). According to the researchers, the teas thus prepared contain a significant amount of plastic residues. These substances are potentially harmful to human health. You may not be enjoying your tea in the same way now.