And this isn't a wall promulgated by Homeland Security. It's not about people trying to get into the U.S. No this wall is aimed at keeping some states from getting resources that other states have. We're talking here about various "United States" states.
Wisconsin recently became the fifth state to ratify this water pact. The agreement needs the ratification of three more states: Michigan, Ohio and Pennsylvania. Then it needs federal approval to go into effect. It would ban any long-distance diversion of Great Lakes Basin water and lays out goals for sustainable water use by the states on the lakes. No pipeline to Vegas, Phoenix or Dallas.
The water issues will not dissolve, but they may precipitate some serious political moves. And they will encourage cleantech aimed at water re-use, recycling and purification. Australia's planning a solar-powered desalination plant. Israel uses desalination on a relatively large scale already.
AND THAT'S NOT ALL...