Transcript for scene 44 of the video " Unlimited Fresh Water - part 1" by Rolf Witzsche - Ice Age Ahead not Global Warming  

When the Next Ice Age begins in roughly 30 years

While the giant North-South river diversion project will not be built for reasons that the source water for the diversion would most likely be disabled at the time when the Next Ice Age begins in roughly 30 years. This means that its more efficient equivalent, the deep-ocean reverse-osmosis desalination project, will be built instead. 

The 30-years timeframe is critical. It is potentially very real.