Suggestion to add extra setting to lobby "Global warming". The more energy is being produced, the higher water level is.
Some extra settings to go with it.
Max water level = 0.7 map max height (so no need to manually input)
Max water change per 10 sec =2 (so no sudden spike change, due to energy production)
EP= global energy production per sec
Extra water level = (EP/EP^02/50)-5 (example formula).
Result of calculations
EP Water level
500 -2.11
1000 0.02
2000 3.75
3000 7.10
4000 10.23
5000 13.21
10000 26.70
20000 50.19
30000 71.34
50000 109.87
There is definitely a better formula for this, but as start for discussion and feasibility of such feature, it is good enough. Needs inverse exponential formula, due to exponential economies.
Not sure if rising water destroys buildings, if yes, nature will heal itself by destroying those pesky AFUS and lowering water level down.
Sucking trees will cause global warming too.