Air consist mainly of 78% N (nitrogen), 21% O2 (oxygen), 0.03%
CO2(carbon dioxide) small amount of inert gases, dust particles and
water vapors.
Except inert gases all these components serve as raw material for living organisms.
Air contain fertilizing element Nitrogen, is essential for growth of all plants i.e. to built proteins and nucleic acid.
WATER:
Water is the most important fluid on earth, forming the basis of all types of life.
Total water resources of the world has been estimated about 1500
million cubic kilometers of the total water of the world. Where 93% is
in the ocean, and 4% in the earth’s crust, 2% is in glaciers and polar
ice caps and only 0.052% is in forest, water, lakes, rivers and in
atmosphere.
Sea water is used for preparation of table salt and other chemicals.
Soil acts as a reservoir for water, rain water percolates in the ground is called gravitational water.
Water that accumulates as a thin film around soil particles is called capillary water.
The water being embedded by dry soil particles is called hygroscopic water.
Natural water is a renewable resource as it forms important bio geochemical cycle.
LAND:
Both the renewable and non-renewable resources available for use of man on or in the land may be inorganic and organic.
Inorganic resources which are used for producing necessary goods are
water mineral fuels or metallifeours ores, building stones etc.
The organic resources are wood, natural grass on pastures, wild games animals etc.
One of the most striking resources of land is its plant cover which depends upon soil, environment and associated animal life.
Forests produce timber , fuel, pulp and natural pastures for animal grazing.
WILD LIFE:
Wild life means all the non-cultured plants and non-domesticated animals
Wild life plays an important role in the balance of nature.
Most of the wild animals are captured by people and they earn money by selling them.
Some important plants and animals have value for their medicinal importance.
Wild life is economically important for developing countries.
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