rocket stove mass heater permaculture article by paul wheaton - Less wood, exhaust is just steam and heat from one fire lasts for days, you can build one in a day and half, and people have built them for under 20 bucks.
Perhaps the greatest medicine ever invented is aspirin. You will learn how to make your aspirin in the wilderness. Everything you need to survive is provided by nature, often in quantities so vast they may appear inexhaustible. But unless you are skilled