Just forget my first sentence. As you're rolling on the ground laughing I'm saying to myself "valich, "open mouth, insert foot": my dumbest statement posted yet. Still the statements about DHMO. And your statement: "Looking at the billion years time scale on the average CO2 is declining. The very long parts of the carbon cycle may not be in balance for instance: CO2 -> Limestone -> Volcanic reduction to CO2. Hence the amount of limestone is steadily increasing at the expence of precious carbon for the biomass. Humanity is doing Earth and nature a great favour by recovering some carbon (from fossil fuels) that would otherwise be lost for the total Earth biomass." Why should we be interested in a billion year time scale. Your talking about when cyanobacteria started producing O2 from C02: we weren't even around. What do you mean that we are "recovering carbon?" We're changing its composition to a GHG. How would it "otherwise be lost for the total Earth biomass"? What's the logic behind this to our benefit?