Comments by "" (@SG-js2qn) on "How Nanotech Can Help Solve the Fresh Water Crisis" video.

  1. Let me try to get closer to the truth: the desert is dry. Where it has had wetlands in the past, these have been drained, making it hotter and drier. Agricultural water use, which in cooler areas would normally soak through the soil and return to aquifers, tends to evaporate in the dry hot air. Most of the wells are deep, tapping ancient water that is not easily replenished. So yes, agriculture IS pumping water out of the ground which can't be replaced, and wetlands and rivers are being drained for agricultural water which then evaporates. As for mountain snow, it's not steady. Some years a weather pattern shifts it northward, dumping moisture in the Dakotas and in the midwest, where they have severe flooding as a consequence, as it did this year. Maybe next year there will be more snow in the southwest mountains. As for a giant desalinization plant project between AZ and Mexico, I've been hoping for such a thing for decades. As you may know, the Colorado River no longer runs to sea, in that it is all used / evaporated long before it reaches Mexico, destroying the river delta swamp that used to exist.
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