Grasslands occur on every continent except Antarctica, and constitute about 34 percent of the
global terrestrial carbon stock. Changes in grassland vegetation due to overgrazing, conversion
to crop land, desertification, fire, fragmentation, and introduction of non‐native species affect
their carbon storage capacity, and may in some cases even lead to grasslands becoming a net
source of CO2. For example, they may lose 20 to 50 percent of their soil organic carbon content
through cultivation, soil erosion, and land degradation.