Renewable natural resources it is considered to be resources which can be restored in the terms admissible in scales of human life. There are several types of renewable natural resources.
Fresh water and oxygen
One of the major renewable natural resources on our planet is water. The nature constantly receives this resource in large numbers as there is an annual loss of an atmospheric precipitation.
As for oxygen, also so far you should not worry about its renewability. Generally oxygen is formed by means of photosynthesis of plants. By the way people consume only about ten percent of oxygen from all structure.
Biological resources
The sum of vegetable and animal weight on all planet belongs to biological resources. Impact of the person on this category of resources led to disappearance of many animal species and plants for a long time. If so goes further, approximately in about 70 years the negative side of this process will be felt. The higher and lowest green plants and also heterotrophic living organisms, that is mushrooms and animals are ranked as renewable resources. Heterotrophic organisms receive energy and food from plants and therefore they are united in one group of renewable resources. The main feature of green plants should be considered an avtotrofnost. In other words, plants are capable to create organic matter from inorganic compounds under the influence of solar energy. It is accepted to call such process photosynthesis. Thanks to it, plants create about 98 percent of organic weight in the biosphere. It turns out that plants create normal conditions for reproduction and activity of heterotrophic organisms. Biomass takes the sixth place among other power sources by quantity of stocks after oil and natural gas now. On performance the biological resources hold the fifth place, having conceded at the same time solar, wind, geo and hydrothermal energy. Also biomass is the natural resource, first in application in the world economy.
Rather renewable resources
Renewable volumes of some resources there is much lower than the volumes of economic consumption. Therefore such resources are especially vulnerable. They have to be controlled by the person carefully. It is possible to carry to rather renewable resources: arable and suitable soils, water resources in regional aspect, the woods with forest stands of ripe age. For example, productive soils are formed very slowly. And the continuous processes of an erosion accelerated by irrational land use inevitably lead to destruction of a valuable arable layer. In one year several centimeters of the soil can be destroyed. Water resources in planetary scale are almost inexhaustible. But Reserves of fresh waters are distributed on a land surface unevenly. Because of it in some extensive territories there is catastrophically not enough water. Also irrational water consumption leads to constant exhaustion of water supplies.