Remember the moisture vaporator that Luke was tending in Starwars? It is what allowed him to live and make a living on the desert planet of Tatooine. In 1978 it was an impossible concept, placed in the fictional world of George Lucas to support the plot.
Now, it’s real. Yes, you really can distill unlimited water, using only the sun, from the driest desert air (or any other air on earth) using what are called metal-organic frameworks (MOFs). There are 20,000+ of them found so far, and researchers have created a prototype device which uses them to pull unlimited amounts of distilled water from 20% humidity desert air. Theoretically, a device the size of a suitcase could provide a family of 4 with drinking water on every day the sun shines. In fact, the same device would work using a wood fire, because all the new invention needs is a source of heat.
This idea has mind-blowing implications. I have read that if every family on earth had a 1/4 acre lot with a house, the entire world could live in Texas, Oklahoma and a part of New Mexico; this article explains why. Now add unlimited energy (wind, solar, fracking, thorium nuclear) for growing food and building shelter, and unlimited fresh water and … now we can fill the earth.* Where have I read that phrase before, by the way?
“…God blessed them [Adam & Eve] and said to them, “Be fruitful and increase in number; fill the earth and subdue it.”” Genesis 1:28 (NIV)
*And did I mention … Mars?