Extracting water out of air (gas) and converting it to a solid requires energy. Or a very narrow timeframe where the air temperture rises to the extent the mesh doesn't follow at the same rate to form the process. Since Ethiopia's relative humidity is at it's highest about 60%,which by our standards is pretty dry it is doubtful his towers will be successful.
Some articles I've read, but I can't find a link, says Vittori is looking for a lot of grant money to support his claim,which is all we have at this time.
FogQuest has been approached by the Mt. Zuquala Monastery (Ethiopian Orthodox Church) to provide a fog-water supply for the monastery