The process by which land becomes more desertlike

Desertification

Explanation:

Desertification is the process by which land becomes more desertlike and unable to support life. This happens when to many livestock overgraze an area.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.