The biosphere is the narrow zone of contact between the land, water and air. It is in this zone that life, that is unique to this planet, exists. There are several species of organisms that vary in size from microbes and bacteria to huge mammals all the living organisms including humans are kinked to each other and to the biosphere for survival. The organisms in the biosphere may broadly be divided into the plant kingdom and the animal kingdom. The three domains of the earth interact with each other and affect each other in some way or the other. For example, cutting of forests for fulfilling our needs of wood, or clearing land for agriculture may needs of wood, or clearing land for agriculture may lead to fact removal of soil from slopes. Similarly earth's surface may be changed due to natural calamities like earthquakes. For example, there could be submergence of land , as happened in the case of Tsunami recently. parts of andaman and nicobar islands were submerged under water. Discharge pf waste material into lakes and rivers makes the water unsuitable for human use it also damages other forms of life Emission from industries thermal power plants and vehicles, pollute the air, Carbon dioxide is an important constituent of air. But increase in the amount of leads to increase in global temperatures. This is termed as global warming There is thus a need to limit the use of resources of the earth to maintain the balance of nature between the domains of the lithosphere, the atmosphere and the hydrosphere The earth is surrounded by a layer of gas called the atmosphere. This thin blanket of air is an integral and important aspect of the planet. It provides us with the air we breathe and protects us from the harmful effects of sun rays The atmosphere extends up to a height of about 1600 kilometres. The atmosphere is divided into five layers based on composition, temprature and other properties. These layers starting from earth's surface are called the troposphere, the stratosphere the mesosphere, the thermosphere and the exosphere.