Well, with high CO2, the buzz in pasture science journals is the improvement of pasturelands. Dryland grasses benefit from high CO2 and the period of ground cover is greatly extended.
The immediate consequence of that has been a diminishment of Aeolian dust. That lack of Aeolian dust is a wonderful boon to pasture on land because it's topsoil blowing away, but it's tragic for the oceans because it's a source of iron for the oceans. It's the primary cause of the collapse of primary productivity in the oceans.
Maybe it's all about salmon. Maybe the name Haida Salmon Restoration Corp. was chosen with some wisdom and intelligence. The village is not a geoengineering business. It's trying to feed its people, trying to solve the problem of 70 percent unemployment, grasping for a ray of hope. It's doing this in its traditional territory. This is the Haida ocean. They are taking care of their own home. Why can't they take care of their home? Why is this branded as a malevolent, controversial, geoengineering scheme?
Can ocean fertilization really help combat climate change on any significant scale?
The major mechanism for controlling CO2 is solubility in water. Anthropogenic CO2's destiny is to dissolve in water. The only source of a nonpolluting amount of energy to match the fossil fuel that won't add more CO2 to the atmosphere is sunlight and photosynthesis. The photosynthetic potential of plankton in the ocean, if restored to 50 years ago, is more than sufficient to manage a large part of the anthropogenic CO2 problem.