Ice is in an expanded state. If it melts, the water level goes down, not up.Put an ice cube in glass of water, and see what happens when it melts.
Or a block of ice in a bucket.
It is physically impossible for CO2 to be a green house gas. Its atomic weight
makes its mass too great to rise above other much lighter atmospheric gases.
Water vapor can create a green house effect because it is much lighter than CO2.
I've yet to see the rise in ocean see levels. The amount of ice in the
Antartic increases annually. Who's kidding who?