When it comes to more complex situations like providing oxygen in an enclosed room, you may find that you will still need to bring air in from the outside.
There are a few wild healing plants that are used as first aid and their properties and knowledge on how to use them have been passed from one generation to
The many spices, teas, and tinctures you can make from your herbs will serve you even during winter. And the abundance of vegetables can last you for years.