Tom Green is the leader of Vesta, an organization that is planning to grind olivine down to sand-size, then sprinkle it in the oceans just off the beaches, where water is not deep. The waves will roll the grains of olivine around and hasten its dissolution into the water. This will change the (now excessive) carbonic acid bicarbonate, an alkali. By doing this on a large scale, the overall acidity of the oceans will be slightly reduced, allowing the water to accept more CO2 from the atmosphere. For the video, https://tosavetheworld.ca/episode-398-how-to-make-the-oceans-less acidic/. Then scroll down and add to the comments column.