When peat bogs become degraded, the carbon stored within can be released back into the atmosphere, and this could have devastating impacts, by accelerating global warming.
Pan fydd mawnogydd yn dirywio gall y carbon sy'n cael ei gadw'r tu mewn iddynt gael ei ryddhau i'r amgylchedd a gall hyn gael effaith fawr drwy gyflymu cynhesu byd-eang.