Scientists are concerned that melting glaciers are exposing long frozen animals. When the ice melts, the animals thaw and begin to decompose. What gas will be produced during decomposition? Will this increase or decrease the amount of CO2 in the atmosphere?

During the bloat stage of decomposition of matter, many gases begin to accumulate. These gases include hydrogen sulfide, carbon dioxide, methane, and nitrogen. Therefore since carbon dioxide (CO2) is one of these gases then we can say that yes, the decomposition of the once frozen animals will increase the amount of CO2 in the atmosphere.