Perhaps more ominously yet, the possibility exists that thawing Arctic permafrost — known to
contain huge amounts of carbon — could release large amounts of methane and carbon dioxide into the atmosphere.
Terrestrial ecosystems, such as the Arctic tundra and Amazon rainforest,
contain a huge amount of carbon in organic matter such as decaying plant material.
Not exact matches
This matters because there is a
huge amount of carbon currently locked up in permafrost, and the methane hydrates alone
contain more
carbon than all
of Earth's proven reserves
of coal, oil, and natural gas combined.