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There are many biosphere reserves around the world today where efforts are being made to protect the environment. There are 669 biosphere reserves around the world located in 120 countries.

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Because of human contamination of the atmosphere, it is estimated that 20% of the population on earth are continuously breathing heavily contaminated air.

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Only 0.3% of the freshwater in the Earth’s hydrosphere is easily accessible by humans. The rest is in the form ice (glaciers, snow and permafrost) and groundwater.

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A.E.H. Love, a mathematician, was the first to describe the concept of the earth's structure consisting of an outer layer in 1911 in his monograph titled "Some problems of Geodynamics".

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Structure Of The Earth | The Dr. Binocs Show | Educational Videos For Kids

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The atmosphere is the fragile, thin layers of gasses that surrounds the earth. The atmosphere contains 5 different layers that are responsible for the earth’s weather. Particles from the air contributes to the planet that helps the weight to be able to push down on earth. Here in our planet, Earth is the only planet with the correct combination of gases that support life.

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The Biosphere contains the living matters on the earth. It includes all living forms such as plants and animals. This portion interacts with the other different spheres. That helps to build a structure of life here on earth. Humans are considered to be part of the biosphere as it contains life existence on Earth.

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The Hydrosphere is the water on the surface of the earth. From the oceans, rivers, lake and also from the rain. Water is essential for the existence and maintenance of life. It is the most important substance needed for all living organism.

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The Lithosphere is the Earths crust. It includes the different landforms, rocks and soils. This is where development of nutrients for different organisms occur in which thus provides environmental habitat. It is basically made up of tectonic plates primarily the continents of the planet.