Hacker News Reader

So, in eons past, carbon was sequestered naturally via calcium carbonate (CaCO3) if I'm following your math we'd need 4B tons of Ca / yr to sequester that yes? Of course, that's vastly more than we produce a year, but it is the 5th most abundant element. Could we scale up CaCO3 production to sequester carbon?

View on HN

The term you're looking for is "enhanced weathering"

My mind wanders to farming calcifying zooplankton. I wonder how hard it is to remove them from the carbon cycle.

You also have to consider that as the oceans absorb more co2, they become more acidic, making it harder for plankton to form shells and sequester carbon.

Reply on news.ycombinator.com