"ഫോർട്ട് ഗേൾസ് മിഷൻ എച്ച്. എസ്. ഫോർട്ട്/അക്ഷരവൃക്ഷം/GLOBAL WARMING" എന്ന താളിന്റെ പതിപ്പുകൾ തമ്മിലുള്ള വ്യത്യാസം

  The continuous rise in temperature of the Planet is really upsetting. The root cause for this is global warming. Global warming begins When sunlight reaches the Earth. The clouds, atmospheric particles, reflective ground surfaces and surface of oceans then sends back about 30 % of sunlight back into the space , whilst the remaining is absorbed by oceans, air and land . This consequently heats up the surface of the planet and atmosphere, making life feasible. As the Earth warms up, this solar Energy is radiated by thermal radiation and infrared rays, propagating directly out to space thereby cooling the Earth. However, some of the outgoing radiation is re-absorbed by carbon dioxide, water vapours, ozone, methane and other gases in the atmosphere And is radiated back to the surface of Earth. These gases are commonly known as greenhouse gases due to their heat-trapping capacity.It must be noted that this re-absorption process is actually good as the Earth's average surface temperature would be very cold if there was no existence of green house gases. As of 2004, over 8 billion tons of carbon dioxide was pumped thermal radiation Is further hindered by increased levels if greenhouse gases resulting in a phenomenon known as human enhanced global warming effect. Recent observations regarding global warming have substantiated the theory that it is indeed a human enhanced greenhouse effect that is causing the planet to heat up.<br>

       While other planets in the solar system of the Earth are either roasting hot or bitterly cold, Earth's surface has relatively mild, steady temperatures because of its atmosphere Which is the thin layer of gases that cover and protect the planet. The main reason for resulting global warming is Greenhouse effect.2.GREENHOUSE GASES The greenhouse effect, combined with increasing levels of greenhouse gases and the resulting global warming, is expected to have philosophical implications. If global warming continues unrestrained and nothing effective is done to limit this evil, it will cause significant climate change, a rise in sea levels, extreme weather events and other ruthless natural, enivornmental and social impacts. There are many greenhouse gases which are mainly emitted by human activity. The first and foremost in the list is carbon dioxide. Excessive burning of fossil fuels like coal and oil is the major factor for producing this gas. Moreover, Deforestation i.e. removal of trees for acquiring lands also causes large amount of carbon dioxide in the atmosphere.Cement manufacturer also contributes carbon dioxide to atmosphere when calcium carbonate is heated generating lime and carbon dioxide. The second culprit gas is methane, commonly Known as natural gases. It is produced as the result of agricultural activities such as livestock digestion, paddy rice farming and use of manure. Methane is also produced due to improper management of waste. Nitrates oxides are generated mainly by fertilizers. <br>

       The major cause of global warming is the greenhouse gases. They include carbon dioxide, methane, nitrous oxides and in some cases chlorine and bromine containing compounds. The build-up of these gases in the atmosphere changes the radiative equilibrium in the atmosphere. Their overall effect is to warm the Earth's surface and the lower atmosphere because greenhouse gases absorb some of the outgoing radiation of Earth and re-radiate it back towards the surface.Even more important was abrupt international action to curb the emissions of CFCs. The second major cause of global warming is the depletion of ozone layer. This happens mainly due to the presence of chlorine containing source gases. When the ultraviolent light is present, these  gases dissociate releasing chlorine atoms which then catalyse ozone destruction. <br>