Not only that, but I guarantee an unintended consequence would come from this.
Increased alkalinity is, no doubt, bad for the whales...
Global cooling by reducing co2...fish kills due to dumping all that lime, declining vitality in the worlds plants and trees due to reduced co2...I can think of all sorts issues. Now the use of lime in a power plant bubbler scrubbing system before gasses escape might be an interesting concept....could something like that be put into cars and trucks?
There was an old lady who swallowed a fly...
I doubt there would be any consequence of either doing it, or doing nothing. It certainly beats the alternative of cutting carbon and killing the economy.
Now if you could make a gaseous solar shade in space to cut solar energy reaching the earth by a percent we could make a new ice age?
Tinkering with the ocean's pH level (which is what they're talking about) is VERY MUCH GUARANTEED to have a whole bunch of bad consequences for a large number of oceanic life forms