If you want to convert the moisture in clouds into water to feed a parched land, you could train to be a sorcerer.
Alternatively, you could go to the Massachusetts Institute of Technology.
Beth Buczynski at MIT’s inhabitat.com has the story on the “giant nets that trap moisture in the foggy mist, and funnel all of the tiny droplets into a container where they add up to water we can drink.”
According to “findings published online in the journal Langmuir, most existing fog harvesting systems are far from optimized. … Postdoc Kyoo-Chul Park PhD, MIT alumnus Shreerang Chhatre PhD, graduate student Siddarth Srinivasan, chemical engineering professor Robert Cohen, and mechanical engineering professor Gareth McKinley, believe that by closing the gaps in the net material, they can drastically improve the efficiency of fog harvesting systems.”
Suzanne's Mom's Blog 
I’ve seen pictures of other fog (or air-moisture) harvesting systems–one in North Africa, I think, and one in Singapore–they look like surreal trees. [Hmm, checking, I see that what I’m thinking of in Singapore is actually somewhat different–manmade “supertrees”]
The one in Africa seems very like this though, in purpose: Warka water tower
(love the Shutterstock fog photo)
I, too, have another example that I can’t quite place. I just know I saw it at an exhibit on innovation in cities around the world that was mounted at the Boston Society of Architects — so many amazing ideas there. And implemented ideas!