Talking about geoengineering schemes is the advanced stage of climate denialism. Theyre all purely conceptual and if they ever are viable won't be available for decades at the earliest. Its all a bullshitting tactic to avoid talking about the extremely radical socio-economic measures actually necessary to avert catastrophe at this point. But those measures are completely at odds with the structural forces of capitalism and class interests of the bourgeoisie, and therefore even if our political leaders had the will to campaign for them they are literally incapable of contemplating them in the first place. Its literally unthinkable under a neoliberal ideological hegemony.