I read a comment here that says that volcanic eruptions and forest fires contribute to global warming. Well not really (negligibly), global warming is more about the increase in the amount of CO2 (carbon dioxide) in the atmosphere. Forest fires have a net zero effect, because the CO2 released was previously in the atmosphere (also nature synthesizes the released CO2 into other compounds quickly enough), volcanoes release poisonous gases and CO2 isn’t a big part of it. The problem is the hydrocarbons from fossil fuel, fossil fuels are very rich in carbon and they generate more CO2 per square foot, pound for pound (when burned) than any burning wood ever could. The bad news is that we burn fossil fuels faster than nature can remove them from the atmosphere (because they are too rich in carbon).