Land degradation is a process in which the value of the biophysical environment is affected by a combination of human-induced processes acting upon the land. It is viewed as any change or disturbance to the land perceived to be deleterious or undesirable. Land degradation: A decline in the quality or performance of land. Or erosion of the earth land surface by water, wind, or ice. Land degradation affects people and ecosystems throughout the planet and is both affected by climate change and contributes to it. The prolonged effect of land degradation has resulted in erratic rainfall causing severe droughts at irregular intervals, and these droughts threaten the lives and livelihoods of millions of people. According to the FAO, the world's cultivated soils - meaning soils that have been rearranged - have lost between 25% and 75 % of their original carbon stock, which has been released into the atmosphere in the form of carbon dioxide. The simulated results of costs of loss of milk, meat, and costs associated with weight loss of animals not slaughtered or sold associated with land degradation in grazing biomass.