Why argue global warming is not a massive existential threat? Both are huge problems, we have the resources to begin tackling/experimenting on both areas, so why downplay solutions to either? The sea is expanding in size as it heats, more ice is melting as it heats as well. This will devastate billions of coast-adjacent humans. It's pretty hard to argue against preventing catastrophic sea-level rise, never mind acidification also being a huge problem.