Because "Peter" said so? "Peter" wrote that...just plain Peter.

I'm not saying it's true...I'm telling you I heard it way back. The plan was to as a last action...nuke the poles, raise the sea level, flood just about every major city. Flooding out a lot of the worlds population. 20ft? 30ft? How much must it rise to effectively end the world economy?

Global Sea Level Rise Map - Global Warming & Climate Change Impact