To counter the global sea level rise, several initiatives have formed to block seas off from the global water flow. The idea behind it: If you control the global water flow, you could control the sea level locally without having to tackle the problem globally. Of course, from a political point of view, this is a case of eco-protectionism taken to the next level. It would create an unprecedented case of separatism, a whole area shutting itself off from global interdependency that is essential to what human culture is – an interdependent global network.
About these plans, one scientist from the Royal Netherlands Institute for Sea Research said: “See this as a warning. What we’re saying is: Here’s a plan, a plan we don’t want. But if we end up needing it, then it’s technically and financially feasible.”
See the article from the New York Times from 2020.