FLOW: For the Love of Water, Part 8

Aww... I've been insanely busy - maybe I can watch the series next week. The water crisis exists primarily because of the population crisis though. 100 years ago we were already suffering a serious water problem - so we had some major works like the Boulder Dam, Central Arizona Canal Project, Niagara Project (which conveniently also supplied huge amounts of electricity) and so on. If you look around the world, many people did the same: build more dams. Now many of those dams don't let enough water run off to maintain the ecosystems downstream - humans want all the water. However, dams cannot propagate indefinitely (otherwise hydroelectric power would be *the* alternative to burning coal, oil, and gas).