Why is water a non renewable resource?I think the water can be recycled in a certain period of time, such as the infiltration of underground water into the ground or evaporated into the sky and then the formation of rain, not renewable it?
Coal is typical of non renewable resources, it is a non renewable resource is needed because of the formation of long geological history in it, and our people's life cycle is shorter than it, we can't wait till it was formed by the formation of a far greater speed -- it to us to its exploitation speed.
Renewable resources, also known as renewable resources, its concept is a dynamic concept, its specific meaning is: "it is updated, or that the regeneration rate is greater than or equal to the speed of development and utilization of resources.
Therefore, not only the number of non renewable resources is limited, in a certain time and space scale, the number of renewable resources is limited. In other words, renewable resources are not inexhaustible resources, it is a dynamic concept. Renewable resources only when we control the amount of cases, balancing the exploitation and the resource regeneration, make our development and utilization rate is less than the rate of formation conditions, is "inexhaustible, inexhaustible".So water is non renewable resources for human consumption and its amount is very large, much larger than the amount of people to get fresh water (fresh water only for us is only meaningful) human can only use the purified water to groundwater and the amount is too small, so now most of the water shortage in the city, advocate save water. Perhaps science developed, human beings can efficiently, quickly put the sea water into fresh water, will be summarized as renewable resources.
