I know there are quite a few things we need to be aware of that could turn our world upside down, but having clean drinkable water does not get the credit it deserves. Is this because we are so used to the water just coming out of the faucet and we take it for granted. There will never be a water shortage on this planet, but there will be a drinkable water shortage. Have a look at this article about the looming water shortage.
I opened my MRE and noticed that everything was still pretty much the same. You have food in foil packets although my packets weren’t in separate boxes. They did include the nutritional insert though and I never understood why they had the extra boxes anyway. Another thing we didn’t have when I was in was the handy ration heater. The ration heater is activated by placing a little water in a bag. The water mixes with an element and causes a chemical reaction that generates heat. You wrap your entrée in the bag,  and in 10 minutes you are supposed to have a hot meal. It didn’t work that way for me.
Freeze-dried food is nothing new. As early as the 13th century, the ancient Quechua and Aymara people of Bolivia and Peru pioneered a form of the process by exposing potatoes to the freezing temperatures of the Andes overnight, then drying them in the sun. In 1937, Nestlé used industrial technology to create the world’s first freeze-dried coffee, and in the 60s and 70s, the US military shipped freeze-dried food rations to the troops in Vietnam.
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