Yes it can. Volcanic areas often release gases, like CO2 and methane, from the ground which can negatively impact the plant life growing above. In Mammoth, California there is an area where levels of CO2 emitted from the ground are high enough to kill the trees through carbon dioxide asphyxia. The toxic gases drive the oxygen out of the soil and cause the root systems of trees to suffocate. These areas are also dangerous for campers who may unknowingly place their tent on a CO2 vent; the amount of gas in the area is enough to kill a human who is exposed long enough.
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