Call me a skeptic, but this just sounds crazy.
Brighten the oceans by making billions of tiny bubbles. And what about the marine life that is now plunged into shadow? Changed ocean chemistry? International agreements about cost and location? “Unknown unknowns?”
What if we stop one day?
Are we ready to bet the biosphere and our civilization on new and extreme technologies? If anyone thinks “hell yeah, we can do anything!” then why can’t we just replace our energy sources with non-carbon emitting ones?
Oh yeah, and what about the other carbon dioxide problem?