I don't understand how the knowledge of canning could be helpful. I can't can food if I don't have food to can.

That knowledge is not helpful for now either. Let me explain. The space used to store canning supplies can be better utilized to store food.

Jeanette Isabelle
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I'm not sure whose twisted idea it was to put hundreds of adolescents in underfunded schools run by people whose dreams were crushed years ago, but I admire the sadism. -- Wednesday Adams, Wednesday