Global warming will cause polar ice to melt and so the sea level will rise. If that is so, then the paradox is if ice submerged in water melts, water level does not rise!!! Then how the sea water level rises?
The other explanation can be rise in temperature causes the water to expand leading to level of rise in water!
The most important and interesting problem is earth is spherical and holds the water on its surface! How can we mathematically model this or carry out experiment on a model? How do we make a model!!!!