KNO3 and nitrites are still used to cure meats, in salami etc. The argument these days is that nitrates/nitrites used for such purposes are potentially carcinogenic.
>KNO3 and nitrites are still used to cure meats, in salami etc.
What? That's absurd. Food processors would never do such a thing. They only use the finest cultured celery powder (filled with "all natural" sodium nitrite).