>>14272875The volcano isn't currently erupting and the kinds of small effusive lava flows which hotspot volcanism produces don't have high volatile content anyway. It's also not the only measuring station, so a discrepancy would be easily visible.
>>14272987Doomers are just as stupid as deniers.
>>14273098It's part of how we've confirmed they're from anthropogenic sources, yes. Plant photosynthesis disfavors the C13 stable isotope. The ratio of C13 to C12 is different for modern organisms than it is for ancient organic material so when fossil fuels are burned it causes a shift in the current atmospheric C ratios that can't be explained by volcanic C13/C12 ratios.
That's not the only means we have of determining CO2 is anthropogenic: my personal favorite for its simplicity is just that we have records of how much fossil fuels and of what kinds humans have been emitting. You can make a carbon budget for the world and take out all the natural sources to see that anthropogenic CO2 is necessary to account for the measured rise.
