The ocean naturally absorbs CO₂ from the atmosphere, acting as a carbon sink. This capacity is determined by a natural chemical property referred to as ocean alkalinity. If the alkalinity increases, the ocean has the potential to absorb more CO₂. There are several proposed methods that can do this, which are referred to as ocean alkalinity enhancement (OAE). One technique involves adding mineral substances to seawater to increase its CO₂ absorption capacity. However, the environmental consequences of such interventions are not yet fully understood.
