Essay on Global Warming and its Impact

Free 800 words essay on global warming and its impact for school and college students.


“Bangkok struggles to protect slum-dwellers as floods worsen’ screams a headline in a report posted by David Spike on the website Job One. This is a direct result of the phenomenon called global warming. Some other examples of global warming are:

  • The rising of sea levels throughout the world
  • The unfreezing and de-icing of the Arctic by September 2037
  • The melting of the polar ice caps

If global warming is not contained, it will lead to:

  • Trouble for anglers and those who rely on ocean animals or their livelihood
  • A continued rise in average global temperatures
  • A reduction in species diversity
  • Widespread death due to air pollution

In addition, much more.

free essay on global warming and its impact

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What is global warming and how does it manifest in the atmosphere

Global warming is the phenomenon of increase in the temperature of the earth. The earth’s temperature has risen by about one degree Fahrenheit in the past century with an accelerated warming during the past three decades. There is strong evidence that most of the warming happening in the earth since the last fifty years can be attributed to human activities.  Human activities have altered the chemistry of the atmosphere through the accumulation of greenhouse gases, which are the main cause of global warming. This means gases like carbon dioxide, methane and nitrous oxide. These gases have heat-trapping properties but it is not known how the earth’s surface reacts to them.

Global warming brings along with it threats like affecting the climate of the earth and disintegrating the health of the people. Also included in this is the phenomenon of alteration of the crop seasons. Global warming also alters the patterns of survival of the organisms including human’s on the earth’s crust. A large mass of the land in United States is likely to become warm. The presence of sulfates may limit the warming in certain areas, but in most of the land mass, warming will surely occur. However, scientists are not able to predict with certainty, which parts will remain wetter or drier. However, there is a general shift in the direction of augmented rainfall and evaporation.

Global warming is also responsible for the melting of the glaciers in Greenland and the Arctic. World-over, the existence of meticulous illnesses and additional pressures to human health depend mainly on the local weather. Extreme warmth could be a cause of loss of life. In addition, many grave diseases manifest themselves in warm areas. Warm weather can also cause air and water pollution, which in turn harms human health.

What are the impacts of global warming

A matter of concern that is staring humanity is that if temperatures become warm once, they will not be able to be made cold again. This means global warming is irreversible. Human beings are adding large amounts of carbon dioxide to the atmosphere through the use of vehicles, power plants burning fossil fuels and forests. Even if we start using non-renewable energy resources, global warming will not be stopped. This will lead to catastrophic consequences or impact. Some of the consequences of global warming could be:

  • Soils in the center regions of the continents might turn out to be drier in summer
  • Corn production in the USA will drop on account of this phenomenon
  • Increase in the length of the season and budging of the agricultural zones northwards
  • Stimulation of large, sudden and uninvited climatic change that could seriously affect the ecosystems and human society
  • Fishes like salmon and cold-water fish such as trout may suffer substantially and may disappear from their current geographic range
  • Average temperatures would increase tediously over the next century
  • Air pollution will reach catastrophic proportions
  • The ‘carbon sink’ as oceans are called will release its dissolved carbon gases into the atmosphere
  • Flooding, drought, species extinction, sea level rising, and stronger storms will increase
  • The permafrost will melt and hundreds and thousands of metric tons of carbon gases will release into the atmosphere
  • The ice that is currently preventing the accumulated organic matter from decay will start melting resulting in widespread decay and degeneration
  • Human diseases will increase
  • Climatic changes will start affecting species physiology, distribution and phenology
  • The temperature of the earth will increase manifold as compared to the current temperature
  • Widespread decrease in the quantity of snow and ice


Thus, we have studied the meaning of global warming. We have also seen its definition. We have also known about its impact on the atmosphere and humans. The ones given above are just some of the consequences of global warming. The full impact of this phenomenon is not yet known in totality. It remains to be seen to what extent, global warming will affect the atmosphere and consequently the human race.

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