On: Researchers propose solar methanol island using ocean CO₂

[sp332]

That wouldn't help de-acidify the oceans. But I guess through diffusion it's all connected anyway.

[riffraff → sp332]

The Mediterranean is connected to the oceans and to the black sea but their salinity is really different, I do not believe diffusion works as easily.

[sp332 → riffraff]

Right but if you take CO2 from the Mediterranean, then it will absorb more from the air, which means the oceans will absorb less from the air.