Photodegradation
（重定向自Photodegradable）
Photo-degradation is the alteration of materials by light. Typically, the term refers to the combined action of sunlight and air. Photo-degradation is usually oxidation and hydrolysis. Often photodegradation is avoided, since it destroys paintings and other artifacts. It is however partly responsible for remineralization of biomass and is used intentionally in some disinfection technologies.