The change in carbonate vs carbonic acid in the ocean is telling (and making life for carbonaceous shelled sea life growingly more difficult.) The loss of glaciers and polar marine ice while possibly enhancing navigation, is already having significant impact both in rising sea levels and changes in ocean salinity. In fact a recent report suggests that as much as 40% of the increased sea level and reduced salinity is directly attributable to human enterprises over the last 2 centuries.
Are you referring to the study about underground water draining out to the sea? It was on here last week, and conjecting the speculated effects of well and other pumped out water usage like this is exactly the kind of illogical contrived causal link that leads people to calling the AGW hypothesis junk science. If you have 2 separate points about possible earth-altering effects, cool, but don't just mash them together in a paragraph as if they have some relation to one another. Aside from this, while the science is still young and not well-vetted (I.e. the models, while making improved correlation to past data, are still consistently incorrect in actually predicting climate), I think your points make some sense and I am highly in favor of trying to keep a balance with nature, as long as we don't do anything that punishes regular people unduly to the benefit of huge corporations and the filthy rich (which is exactly what forcing far greater costs for energy production would do).
With your bare hands?!?