Hi longnshort.
Ok, lets call "the last major volcano" Mt Pinatubo, Philipines, 1991. I found estimates of total ejected material at 10km3, 5km3 dacite (lava) and 20M tons of SO2 (largest every observed). Temps in stratosphere increased as much as 3.5 deg C at some latitudes, global temps might have seen 0.5 deg C decrease for 2 - 4 years.
Most of the lava and ash would have settled, so 20M tons of SO2 would be the bulk of the pollutants, which you claim is "more than all of man for his entire existence".
In 2002, total world coal production was 5.3B tons. At a specific gravity of about 1.5, that is 3.5Km3. The total mass of pollutants released by combustion of this 5.3B tons is much higher, as combustion results such as CO2, CO, H2O, etc, obtain most of their mass from the atmosphere.
So I hope you can see that there is a slight order of magnitude problem here. Perhaps you could direct my attention to a more promising volcanic eruption which you had in mind when making your claim? |
