Remember that the sum of all yearly volcanic activity is quite less than 1 billion tons of CO2 per year, while the sum of human activities is over 29 billion tons of CO2 per year, and that considering all the world volcan and not only a single one, volcanic activity have been quite constant on not geological timescale, and so all that CO2 is already balanced in the natural CO2 cycle.
The danger of human CO2 is not simply its size, that's dwarfed by the total sum of the natural emissions, but that's is unbalanced by the natural carbon-sinking activities.
Said that, I agree that the age of the private car going on is likely going to end, and good riddance in my opinion.
