The earth is a small plant in the universe. This is the only place in the universe where life ids possible. It is generally believed that the earth is about 46oo million years old. Life appeared in this earth more than 3000 million years ago. The science and technology made t tremendous progresses in the resent century and in the previous century. The natural diversity of the earth made it so special as a living place. The earth atmosphere is consisting of the essential gases like Nitrogen and oxygen. The valued of carbon –di-oxide is very important fro the all plants. The plants made their own food with the help of carbon di oxide. When the life began on the earth some 3100 years ago the earth atmosphere probably contained nitrogen ammonia, hydrogen, carbon di- oxide and carbon – monoxide. Some other valuable gases are hydrogen sulphide, methane but no free oxygen was there in the atmosphere. All the volcanoes were very active at that time. They contributed a large proportion of gases in the atmosphere.
As there was no oxygen there was no Ozone layer. Ozone is formed by the action of shortwave radiation oxygen. The UV ray from the Sun can easily enter into the earth’s atmosphere. This UV light m made a well contribution in the formation of life on the earth. The climate of the earth at that moment was very dangerous. The frequent thunders and electric discharges were common and naturally occurred at that time. Under the influence of energy in the form of UV ray and electric discharge and gases from volcano and variable temperatures some how synthesizes the organic molecule called amino acid which is unit of forming a protein molecule. The important comportment of every living cell is DNA and RNA. They are formed from some inorganic substance. After 3100 million year human being are the superior in the living kingdom. Only human can save this earth… almost one percent of the atmospheric gases are now green house gases. .. Ozone is a minor constituent of atmosphere but play an extremely significant role by providing a protection screen against deadly UV radiation n. thus making life on land possible. The maximum concentration of ozone is around 10 ppm in the stratosphere where it exists as a band at altitude of about 25-30 km. carbon dioxide is a colorless, non-toxic gas that readily dissolves in water.
How’re, since about 1850 the level of CO2 in the atmosphere has been rising dramatically rises. This produces a deep impact on the world climate. The two most important reasons for this increases in carbon di oxide in the atmosphere are estimated that from about 290 ppm in 1850. Now it has increases about 334 ppm in 1979it is going to be double in the next 10 years. The green house gases produce form various sources like automobiles, industries and refrigeration and air conditioning. The CO2 has some unique properties like it can absorbing the outgoing heat in from of infrared radiation. Hence increases in carbon dioxide in the atmosphere would result in a warming of the earth. The warming is popularly referred to as greenhouse effect. It m takes its name from the warming in green houses where sunlight freely enters through the glass panes, but the heat generated in the form of infrared radiation in largely absorbed by the same glass panes. In the other words CO2 acts much as the glass pans do preventing heat to escape. It is the green living style that can reduces the production of green house gases and consequently the heat generation due to green house gases will also reduced. We need more technology that will find energy efficient way to get a green eco-friendly living.
E- Waste means the electronics waste material that produces different chemical substances harmful results for our environment. E-waste has become one of the most power full threats for the world environment.
