Intact moors are among the most important carbon sinks or reservoirs in the world. The enormous significance of these ecosystems for climate protection is barely noticed. Although they cover only three percent of the world's land surface, they contain a third of terrestrial carbon reserves (i.e. reserves bound in the soil) – twice as much as in all the world's forests put together. Intact, i.e. peat-forming moors grow by around one millimeter a year, which enables them to bind a further 250 million metric tons of carbon dioxide from the air.
However, living or growing moors are now rare due to many years of use for agriculture and peat extraction. In Germany, for example, 95 percent of the original 1.5 million hectares of moorland has already been dewatered, peat-exhausted, built upon, or used for agricultural and forestry purposes. During the drainage and the accompanying aeration of the peat body, it oxidizes and enters the atmosphere as the climate-damaging greenhouse gas carbon dioxide (CO2).