Conversation

At first I thought “oh, I guess silver iodide is probably a pretty bad pollutant” but it doesn’t seem to be? Maybe the more important problem is that it appears not to work very reliably.
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Water desalinization costs continue to drop. I think it is feasible to build a National Irrigation Grid, an effort like the interstate highway system, to ensure no area in US undergoes drought. Also maybe turn Libya/Egypt and Australian Outback into rain forests.