Sunday, 18 March 2012

Global Warming is a Threat to Life on Earth

                                                         Global Warming is a Threat to Life on Earth

                                                     ‘’That amid our highest civilisation
                                men faint and die not merely with want and poverty,
                                          but with niggard ness of men towards
The concept of global warming is relatively modern to mankind. It is a general and scientific assumption that the temperature of our earth is constantly increasing and will subsequently cause great climate changes in all areas of the world. Ecological scientists believe that it is all because of man’s unfriendly environmental activities. Global warming is the major problem caused due to reckless industrialization, deforestation, over population and insensitivity towards environment. Global warming, also known as green house effect, is the increase in average temperature of earth’s near surface due to gathering of gases above earth’s crust. By trapping heat near the surface of earth green house effect is warming the planet at such a rapid pace that over the next century, the global temperature will rise by several degrees causing instability to environment and threatening the life on earth.
Global surface temperature has increased 0.74±0.18ºC between the start and the end of 20th century. It will probably rise further from 1.1ºC to 6.4ºC during the 21st century. IPCC concludes that the temperature increase was caused by increased concentration of green house gases produced from fossil fuels burning; e.g. the concentration of CO2 and CH4 has increased upto 36% and 148% respectively since the mid 18th century. The effects of rising temperature seem astonishingly disastrous.
Owing to global warming, glaciers and icebergs are melting and the level of water in oceans is rising due to liquid expansion. The sea level is rising at the rate of 2.8-3.1mm per year. Sea levels are expected to rise 7-23 inches by the end of century. The rise in sea level would be disastrous for some places. Islands will disappear; meaning their millions of inhabitants will have to relocate. Floods and hurricanes are likely to occur along the coast lines all over the world, displacing more people and ruining cropland. Some countries might simply cease to exist e.g., there is a danger of drowning of Maldives island.
As a result of global warming ice is melting all over the world especially at poles. Arctic is very severely being affected due to global warming. Less fresh water will be available in future. Ecosystem will change some species will move farther north for their survival; while others won’t be able to move and become extinct. If sea ice disappears, then many species of plants and animals including polar bears, sea lions, penguins, foxes and alpine plants would also disappear from the globe. Another worth mentioning point is that when ice melts land or open water takes its place. Both land and open water are on average less reflective than ice and thus absorbs more solar radiations which in turn cause more melting and the cycle continues.
Increased temperature and higher concentration of green house gases may negatively affect photosynthetic activity of plants. This will reduce the reproductive capability and agricultural yield. This may give rise to famine and drought. Species that depend upon each other may become out of sync. Global warming is damaging various places pf earth leaving lesser room for living bodies to survive and live comfortably. As a result earth is changing into a place of severe competition where only fittest will survive.
This brings us to conclude that both environment and living organisms are threatened by damaging effects of global warming. Global warming, rising sea level and melting glaciers are turning the planet into a place where the survival of human and biological life is becoming more and more difficult, if not impossible. Environmentalists have suggested a variety of ways dealing with it. We can overcome global warming by reducing the emission of pollutants, harmful heat absorbing gases and chemicals. Moreover, international organizations like WWF, Green Peas, and IPCC should corporate with one another and launch environmental friendly campaigns. Media should be sensitized to disseminate awareness among people. In this way we would be able to make this earth a heaven.
                " Modern technology; owes ecology an apology".


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