if the green beans are canned in a........... pressure canner .............for the time needed.........there is NOTHING.. that can go wrong.. [I]canned a hundred qts year before last....been canning all my life and mom did also... so no frozen beans for this ole gal.............and no truth to that statement either and like the other lady... if it can go in a jar ...i put it there... chicken,, turkey,,, dried beans.. pickles.. cowboy candy you name it i bet i have put it there...and lost very very few over all the years....