In part one of this article, I covered the American West’s water problems, as well as some of the ways they have been solved with big engineering projects so far. Now, with climate change and growth both pushing the limits of water supplies, people are asking for even bigger projects, like a pipeline from the Mississippi River to somewhere in the Colorado River’s basin. Let’s talk about those ideas, even bigger ones, and why none of them might be a good idea.

Arizona state legislators asked Congress to consider a pipeline that dumps Mississippi water into the Green River, but there are alternate possibilities.