What are different segments of the earth's environment ?

Explanation

Environment can be divided into four segments.
1) Atmosphere 2) Hydrosphere 3) Lithosphere 4) Biosphere .
1) Atmosphere : The layer of air present around the Earth is called the atmosphere. The atmospheric air contains `N_(2)`, and `O_(2)`, in large proportions, while the rest of the gases like `CO_(2)` , are present only in smaller proportions.
Atmosphere absorbs harmful radiations coming from the Sun. It plays an important role in maintaining the heat balance on Earth.
If the proportions of the gases, especially `O_(2)` , and N, are disturbed by human activity, the equilibrium of the echo system is lost. It leads to disastrous consequences.
2) Hydrosphere: Hydrosphere includes all the surface and ground water resources i.e., oceans, rivers, lakes, polar ice caps etc., 97% of earth.s water is locked up in oceans. 3% is trapped in polar ice caps. Only small percentage of water is available for drinking, agricultural and indus trial purpose. 80% of the earth.s surface is covered with water.
3) Lithosphere : One fifth of the total Earth surface is in the form of land. Inner layers of Earth contain minerals. Deeper inner layers of Earth contain Natural gas and oil. All these things, including hills and mountains come under Lithosphere. Plants, animals and human beings are occupied by it.
4) Biosphere : All living organisms like plants, animals and human beings constitute the Bio sphere. Biosphere and other segments of the environment are inter-related, Biosphere is dependent on Atmosphere and Hydrosphere. Polluted atmosphere arrest the plant growth and bring health hazards among animals and human beings. Contaminated water causes many diseases and also death of aquatic animals.