This mass extinction has long been linked to a large and abrupt release of carbon dioxide into the atmosphere, but the exact source of this emission has been unknown. (sciencedaily.com)
A new study documents evidence of a massive release of carbon from permafrost as temperatures rose at the end of the last glacial period. (pearltrees.com)
The degradation of one third of the world's soils has already prompted an enormous release of carbon into the atmosphere. (unfccc.int)