therefore human emissions upset the natural balance, rising co2 to levels not seen in at least 800,000 years.
therefore human emissions upset the natural balance, rising co2 to levels not seen in at least 800,000 years.
carbon dioxide in earth's atmosphere:140
while co 2 absorption and release is always happening as a result of natural processes, the recent rise in co 2 levels in the atmosphere is known to be mainly due to human (anthropogenic) activity.