Worth noting also that roughly half of oxygen in the atmosphere comes from the ocean, the large majority of which comes from plankton. The same type of plankton

Worth noting also that roughly half of oxygen in the atmosphere comes from the ocean, the large majority of which comes from plankton. The same type of plankton that bloom from iron. Scientists have been investigating whether manually spreading iron dust over the ocean can be an effective way to undo the damage that our rapidly rising ocean acidity is doing to our oxygen supply