(FILES) This file photo taken on December 16, 2015 shows Pope Francis drinking "mate" -traditional herbal infusion- during his weekly general audience at St Peter's Square in the Vatican. The International Agency for Research on Cancer (IARC) of the World Health Organization, which had qualified mate and coffee as "probably carcinogenic for human beings" in 1991, presented a new evaluation on June 15, 2016, establishing that neither of them would be carcinogenic if not drunk with water over 65 degrees Celsius. / AFP PHOTO / FILIPPO MONTEFORTE / TO GO WITH AFP STORY BY MAURICIO RABUFFETTI