Nearly every living creature on earth requires oxygen to survive. This includes bacteria and other little creatures that like to feast on your stored food.
If you can remove the oxygen from the environment, then these little bugs can’t be present to munch on your preps.
One way to do this is with Mylar bags and oxygen absorbers, so check out this excellent how to article by backdoor survival.com:
Read more at… How to Seal Food in Mylar Bags