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The earth is mainly formed by the water. It makes more than the 80 percent of the earth surface. The earth is also known as the water planet. The water resources are of different types. They can be fresh water or ocean water resources. The fresh ...

The atmosphere is defined as a gaseous envelope which covers the earth. It consists of many layers. These include the troposphere, stratosphere, mesosphere and thermosphere. The troposphere extends from the earth to up to 10 kilometer. The stratosphere extends from 10 to 60 kilometer. In ...

The energy problems are increasing day by day. They are serious and can become critical in the coming time. We should follow certain energy saving programmes. The life style should be modified. One should preserve the energy by switching off the lights which are not ...

There are the other sources of energy. It includes the, solar energy and different types of power like nuclear, wind and hydroelectric. The energy from garbage and geothermal is also a good source of energy. The solar energy is the non exhaustible source of energy. ...

The fossil fuels include the coal, petroleum and natural gases. They play a vital role as a source of energy. The oil resources are limited and have a great demand. This is due to the increase in population and increase in demand of automobiles. There ...

The natural resources are of multiple types. These are classified on the basis of chemical composition, abundance and availability and presence in the different parts of world. There are inorganic and organic resources. The inorganic resources include mainly air and water. The organic resources include ...

The man is the most dominant animal of the biosphere. It has well developed physical and mental features. He has nice skills to manipulate the things and make tools which are essential for survival now days. He is a social animal. He has the ability ...

It is defined as the branch of biology which deals with the rate of production of biomass. It deals with all the trophic levels. It also deals with the whole of ecosystem. It includes the gross primary productivity, net primary productivity, community and secondary productivity. ...

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