There are changes in the environment which are brought by the man. They bring the changes in the physical, biotic conditions and the natural resources conditions. The humans have affected the physical conditions of earth in an adverse manner. He has cut the tress and ...

These are also known as the living resources. These are the renewable resources and include the plants and animals. The foods, sugars, tea, coffee, medicines are obtained from the plants. The timber is obtained from the tress and is used for the construction, furniture, ships, ...

The uranium is a metallic mineral. It is used in the nuclear bombs, electricity and in tinting glass. The thorium is also a metallic mineral. It is used in the nuclear bombs, electricity and in gas mantles. Iron is used to make steel. The manganese ...

These are the natural resources which cannot be renewed. They are present in the organisms as an organic and inorganic molecule and ions. The calcium, phosphorous, sodium, chlorine and sulphur are the major minerals in the animals. The minor minerals in the animals are iron, ...

There are many factors which play a role in the conversation of soil. In order to conserve the soil the top most layers must be preserved. It is the ideal layer for the growth of plants. The fertility of the soil must be restored. It ...

The formation of soil occurs by the process of weathering and soil development. The weathering is further divided into the physical and chemical types. It is basically a destructive process which changes the rocks into soils. The physical weathering occurs with the help of wind, ...

They occupy nearly 20 percent of the earth surface. It covers around 13000 million hectares of the area. The houses, roads and factories occupy nearly one third of the land. The forests occupy another one third of the land. The rest of land is used ...

These are also known as the marine resources. The oceans cover around 70 percent of the earth surface. The oceans are still unexplored and they have large resources. The land have limited resources. They are a source of fishes and other edible organisms. In the ...