I'm starting to think about remediation tactics and strategies for ocean acidification, starting with the Billion Oyster Project which I'm a little bit familiar with.
They recycle oyster shells!!!!
Google returns a search result for prevention, but I'm more interested in remediation
This amazing research article from the Yale School of Environment talks about increasing seagrass growth (Source)
Seagrasses capture and photosynthesize any CO2 that may be absorbed by the ocean, and vastly help coral reef growth
They also explain why seagrass ecologies are diminishing: Yet seagrass ecosystems are being wiped out, thanks to everything from pandemic disease to water pollution and coastal construction projects. The rate of loss has skyrocketed from less than 1 percent of global seagrass cover per year in the 1970s to 7 percent annually in the 2000s, making seagrasses one of the planet’s most threatened ecosystems.
Also this note on an unintentional oyster bed remediation: The Chesapeake Bay, he notes, has seen the largest oyster reef restoration effort to date and also possibly the largest (and unintentional) ocean acidification buffering experiment. About 196 million bushels of dredged oyster shells were put back into Chesapeake Bay from 1960 until 2006, before the project coordinators ran low on shells.