Natural resources generally refer to natural conditions (natural environmental elements) that exist in nature and can be used by human beings. The United Nations Environment Programme is defined as the natural environmental factors and conditions that can generate economic value to improve the current and future welfare of mankind under certain time and place conditions. It usually includes mineral resources, land resources, water resources, climate resources and biological resources. It is closely related to human society; It is not only an important foundation for human survival, but also a necessary condition and place for the source of raw materials and fuel for social production and production layout. Natural resources are only relative concepts. With the improvement of social productive forces and the progress of science and technology, some natural conditions can be transformed into natural resources. For example, with the development of seawater desalination technology, in arid areas, part of seawater and salty lake water may become the source of fresh water.