What is Global Warming and how would it affect?

Global Warming
Global warming is the phenomenon of increase in the average temperature of the atmosphere, oceans, and landmasses of earth. This phenomenon was noticed to occur in the last two centuries, and especially in recent decades. Global warming has always existed in earth's history, being associated with the maximum solar cosmic phenomenon. Our planet has warmed and also cooled many times during its history. Nowadays earth seems to be facing a fast warming process that is mainly caused by human activities. The main cause of this warming is thought to be the burning of fossil fuels like coal, oil or natural gas. When these fossil fuels are burnt as fuel in different operations on earth, carbon dioxide and other substances known as greenhouse gases are emitted into the atmosphere. As a result of it, the atmosphere tends to become rich in these gases and acts like an insulator, holding more of the heat provided by the sun.

Global warming has profound effects on nature. Raised sea levels, extreme weather, melting of glaciers, the extinction of many species, declining human health etc are some of the signs of global warming. Against global warming goes a sustained battle, and one of its major consequence is the ratification by governments of the Kyoto Protocol to reduce emissions of pollutants that affect the rate of heating. The climate is changing due to external factors like volcanic eruptions and the greenhouse effect. The main cause of global warming is the increasing concentration of greenhouse gases due to human activities in the era of industrialization, especially in the last 60 years. However, there are other assumptions, that assign the heating process to the variations of the solar activity. These effects are not instantaneous. Thermal inertia of the soil and oceans leads to the assumption that the current state of climate is not in equilibrium. You may know that even if the greenhouse concentrations found are maintained at the level of the year 2000, the climate would still become warmer by 0.5 C.

Few people understand what the greenhouse effect is. One should know that the greenhouse effect is a natural phenomenon by which a part of terrestrial infrared radiation is retained by Earth's atmosphere. The effect is caused by the greenhouse gases that reflect back the radiation. Human activity during industrialization period is mainly responsible for the increase of greenhouse gases. This has led to: carbon dioxide emissions due to combustion of fossil fuels for transportation, heating, air conditioning, electricity production in power plants and industry. Increasing CO2 is exacerbated by deforestation, due to all human activities. The deforestation process reduces the CO2 amount absorbed by plants.

One of the best actions to reduce global warming is to reduce energy consumption by: adoption of technologies that are not energy intensive, reducing energy consumption by reducing artificial lighting, developing transport efficiency using hydrogen as fuel instead of oil and using biodiesel as renewable fuel. In order to reduce CO2 emissions, it is recommended to use energy that does not rely on combustion technology such as solar, hydro and wind power. Solar power is difficult to be captured, current recommendations are that it should be captured in the form of biomass. Current exploitable hydropower is limited and can not meet the demand, but it plays a key role in covering the peak loads. Wind energy is only available in certain areas, but its abstraction efficiency is low.

As a conclusion, it is easy to understand that global warming affect us and the future generations because it will cause raising the sea levels and therefore many cities located on the shore will disappear and people who live there will have to abandon their places and move elsewhere. It is also responsible for the occurrence of extreme weather that will lead to floods and storms, melting of glaciers, the extinction of many species and big changes on human health. The increase in the average temperatures will also cause the expansions of deserts and drought because the water cycle will be severely affected. Therefore future generations will have to get used to live in a warm and doubtful climate.

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Edited by: Rajesh Bihani ( Find me on Google+ )

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