the german tea expert Ernst Janssen recommends to also use boiling water to prepare green tea as most of the teas are contaminated with germs and other things. different green tea brands including organic tea brands were tested by the renowned German test.de magazine and they confirmed that, also most of organic teas are contaminated. and since this is nothing you can easily check at home, better use boiling water.
https://www.ernst-janssen.com/tee-almanach https://www.n-tv.de/ratgeber/Stiftung-Warentest-bewertet-gru...