I thought you were asking what comes after 23 );
Answer:
at least 5 citities will feel it
If the water to rise then that could wipe out things like Florida which is only 10 feet above sea level and the population could go down depending on how high the water rose
Answer:
Define your problem. ...
Find out the reasons behind the numbers. ...
Talk to your visitors. ...
Use segmentation to get actionable data. ...
Articulate a Hypothesis for your test. ...
Test substantial variations based on your Hypothesis.