Question:
What percent of CO2 in the air derives from volcano exhaust?
What percent of CO2 in the air derives from volcano exhaust?
Submitted by: Mike Fouts, Anchorage, AK
Answer:
Over the long term, volcanoes emit about 5 x 1011 kg of CO2 to the air annually. This amount is approximately 3% of that emitted by anthropogenic activity.