Exactly! And it always has changed. 10,000 years ago sea levels were 800 feet lower. That would really be a problem if buildings lasted, in useful condition, for more than a couple of hundred years. But they don't and human beings like to build new things constantly. So even if the sea level doesn't change most of today's coastal cities will be virtually rebuilt in 200-300 years and that change will go on and on.
I notice you refuse to answer a simple and serious question that I have put to you twice now.
If you are talking about change in last 100 years.....if that’s your question........I am not sure there has been a significant Climate shift in that time. I believe originally the calculation was that it might take 3,000 years or so for Caps to melt. However, now they say it might take only couple of hundred years at the current pace. So no, there is is nothing IMMEDIATE that is expected, either in our lifetime or next generation’s. The thing is that a problem as big as Climate Shift, you can’t fix it AFTER it begins or can you? You have to take precautions to best of our understanding what is causing the cap melting and take steps to prevent it. I would think NOW would be a good time to get started and not 150 years from now.