Artificial upwelling is a geoengineering climate solution with a long history. The concept: mimic natural ocean upwelling by pumping cold, nutrient-rich seawater up from ocean depths via pipes to the surface. There it can cause a growth surge in CO2-absorbing plankton, nourishing aquaculture and tackling climate change. Closer to shore, the technique could even protect … Continue reading Marine artificial upwelling, problematic climate solution slow to advance