10:20 pm - Thursday August 17, 2017

Global Warming and its Impact

GLOBAL WARMING AND ITS IMPACT

 

DEFINITION 

       Global Warming is defined as “the increase in the average temperature on Earth”. As the Earth is getting hotter, disasters like hurricanes, droughts and floods are getting more frequent.

          The sun is the Earth’s primary energy source, a burning star so hot that we feel its heat from 150 million kilometers away. Its rays enter our atmosphere and shower upon our planet. About one third of this solar energy is reflected back into the universe by shimmering glaciers, water resources and other bright surfaces. Two thirds, however, are absorbed by the Earth, this warming land, oceans and the atmosphere. Much of this heat radiate back into space but some of it is stored in the atmosphere. This process is called greenhouse effect.

    Greenhouse gases heat up our planet. They are part of the Earth’s atmosphere and trap warmth emitted by the sun, thus heating Earth. It is this process – the greenhouse effect – that makes life possible on the planet.

       Nitrogen, Oxygen and Argon make up 98 percent of the Earth’s atmosphere. But they do not absorb significant amount of infrared radiation and not contribute to the greenhouse effect. It is the more exotic components like water vapor, Carbondioxide, Ozone, methane, nitrousoxide and chlorofluorocarbons that absorb heat and this increases atmospheric temperature.

      Throughout the Earth’s history, temperature has varied greatly, mostly depending on the concentration of greenhouse gases in the atmosphere.

CAUSES

Carbon Dioxide

      Carbon dioxide is the first greatest reason for man-made climate change. The amount of carbon dioxide in the atmosphere has been influx throughout the Earth’s history but the United Nations Intergovernmental Panel on climate change estimates that in pre-industrial times CO2 made up around 280 PPMV (parts per million volumes) of the Earth’s atmosphere.

     While there are other greenhouse gases like methane and ozone that trap more heat per molecule. Though water vapor, methane and ozone are more efficient yet have less effect on climate change due to their smaller atmospheric concentration.

Industrial Pollution

      Industrial states of the world are being accused of atmospheric pollution that spurs global warming and now developing countries likeChinaare adding to pollution by heavily relying on coal for power generation.

        Industrial states, led by theUnited States, add to pollution through gas and heat emissions from their factories and the fleet of big cars they use.

        Now not only coal, which is being used by developing countries as a source of energy but also the heavy number of automobiles on roads cause a great deal of pollution and slow change in climate.

IMPACT 

        The adverse impact of the rising global warming on human and other forms of life i.e. animals, plants, weather, glaciers, economy is becoming clearer day by day. It continues to multiply, as the tussle between the developed and developing Nations to implement emission cuts continues.

      The average temperature of the planet for each year, over the last decade, has been featuring in top 25 high temperatures of all time. In fact, 1998 and 2005 were the hottest years in the history of earth.

       There is no doubt that many animals will bear the brunt of climate change and a large number of animal species will disappear from the planet, owing to loss of habitat.

      Owing to the drastic changes in temperature levels, various plant species have been experiencing difficulties in adapting to the areas wherein once they flourished and it is expected that these plants will become extinct by the end of this century.

     There are thousands of glaciers spread all over the world which form an important source of fresh water, these glaciers have disappearing at an alarming rate. Melting glaciers can trigger severe natural calamities, such as flash foods, in the surrounding regions. More importantly, the melted water flows into the oceans thus causing the sea level to rise, which eventually leads to submerging of low lying areas such asBangladeshandMaldives.

       When the whole environment will experience the effects of global warming, naturally humans won’t be an exception. In fact, we will be the worst affected beings on the planet because directly or indirectly we are dependent on all the components of the environment.

 COHERENT ARGUMENTS

        There is no doubt that global weather is growing significantly warmer; this is an indisputable fact. It has become a global issue although it is hotly debated in international circles. It has a fair share of supporters and critics. Its proponents warn that if immediate preventive steps are not taken it will have a disastrous effect on future humankind.