“Peatlands and marshes are the carbon sink champions. The world's peatlands account for about a third of the total CO2 absorbed by soil, although they make up just 3% of the world's land area.
In these wetlands, plant debris sinks into shallow, slightly acidic water. The debris doesn't decompose in this oxygen-poor environment and instead turns into carbon-storing peat.
Draining peatlands exposes the layers underneath to oxygen, triggering a decomposition process that releases CO2. Oxidation also produces nitrous oxide , which is about 300 times more harmful to the climate than carbon.”