globalwarming awareness2007
The glaciers located between the Tropics are of minor importance on an ice scale of planet: they represent approximately 2800 km2, is less than 5% of the glaciers of mountain (except poles) in the world and hardly 0,16% of the continental ices. A percentage close to that which the only glaciers of the Alps reach. These proportions are even weaker if one reasons in term of volumes of ice. It is to say that their disappearance would pass unperceived, the level of the oceans would not move even of a millimetre. Even the large endoreic lakes collecting their melt waters, like the Lake Titicaca, would vary in not very significant proportions, the factors which control the levels on a these vast basin slopes scale being especially the precipitated and evaporated quantities of water.
Mankind has been facing many problems which pose a threat to the very existence of all living beings on earth. Globalwarming awareness in 2007 is among the many crucial problems. GlobalWarming, in brief, is the warming of the planet Earth. Our planet is continually being warmed by different sources. This total process of warming of the earth is due to various factors. Why do we need to be so cautious of it? The truth is that certain human activities are severely affecting this process in a negative way. Industries and the modern factories release gases in a large amount, which enter the atmosphere and stay there. They have the ability to absorb the heat and also to send it back towards earth. In this way, the planet’s overall temperature starts increasing and this in turn results in more diseases and more severe natural disasters thus causing thousands of deaths.
This mechanism by which carbon dioxide traps heat in the atmosphere is also referred to as the “greenhouse effect”. Carbon dioxide, along with other greenhouse gases, allows the shorter wavelengths of energy radiating from the sun to pass through to the earth’s surface and then heat it. However, the hot earth emits only the longer wavelengths of energy back into space. The CO2 molecules in the atmosphere do absorb these infra-red radiations before it escapes into space and thus a certain amount of heat is retained in earth’s atmosphere, providing an additional source of energy. This heat energy adds to the already passed through energy from the sun and causes a warming effect on the planet. This in turn has many effects; it increases the average temperature of parts of earth, due to excessive heat the polar ice caps start to melt away causing a rise in sea levels, thereby flooding many coastal areas of the world. In short, these effects are truly catastrophic. It is believed that without water vapor, CO2, and other greenhouse gases in the air, the planet’s average temperature would be about 34°C cooler on average than it is today.
The reason behind our worry is that certain human activities are now disturbing the natural equation between the processes that release carbon dioxide into the atmosphere and the processes, which remove it. In particular, the burning of fossil fuels such as coal, petroleum and natural gas tends to increase the amount of carbon dioxide in the atmosphere. According to one estimate, the burning of fuels releases about 18000 million tons of carbon dioxide into the atmosphere every year. The destruction of forests to make cultivated fields also decreases the consumption of the carbon dioxide by plants, because cultivate fields are less efficient in photosynthesis than forest.
It is certainly one of the biggest problems facing the scientists of our time. Finding a solution to this massive problem is not an easy task, but the sure thing is that we will have to work together in a collective way if we are to escape from the dangers of over-warming of earth. Here we take a look at this problem from the eyes of a normal average person. It is very important to spread the awareness of this vital issue so that everyone can help to slacken the pace of life threatening problem.
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