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The effect of global warming

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THE EFFECT OF GLOBAL WARMING
“Global warming will be the greatest environmental challenge in the 21
st
century.”
- Vice President, Albert Gore.
One of the most current and widely discussed factors which could lead to the ultimate end of
existence of earth and man is global warming and its devastating effects. It has been a global
concern. Scientists have asked how fast the earth is heating up, and how the warming effects on
earth may affect crops and climatic conditions and ultimately to the very existence of mankind.
Several current trends clearly demonstrate that global warming is directly impacting on; rising
sea levels, the melting of icecaps, and significant worldwide climatic changes.
It is important to understand and discuss the significance of global warming. Global warming is
also known as the “Greenhouse effect”. The greenhouse earth is surrounded by a shield of
atmospheric gases, rather than a glass or a plastic cover. The air that makes up our atmosphere
consists primarily of nitrogen and oxygen molecules (N2 at 78% and O2 at 21%). A large
number of trace gases make up remaining of airs composition. Many of these, including carbon
dioxide (CO2) and methane (CH4) are the so called greenhouse gases. If one has ever felt the
piercing cold of the clear winter night sky and wondered why you feel warmer on a cloudy
winter night, one have experienced the atmospheric greenhouse effect in the first hand.
The earth is about 60 degrees Fahrenheit (33 degree Celsius) warmer than it would be if it did
not have the atmospheric blanket of greenhouse gases and clouds around it. Clouds and
greenhouse gases keep the earth warm. Once warmed, their molecules then radiate a portion of
this heat energy back to earth, creating more warming on the surface of our planet. It is this
radiation which causes atmospheric gases to move back to earth that scientists call the
“Greenhouse effect”.
On Friday, February 2, 2007, the United Nations’ Intergovernmental panel on climate change
(IPCC) the leading international group of climate scientists published a 20 page summary of
a much longer scientific report, The physical basis of climate change, which conforms global
warming is now unequivocal and states with more than 90 percent certainty that “human
activity” very likely has been the primary cause of rising temperature worldwide since 1950.
The intellectual powers that we enjoy has enabled us to make effective use of technology and
thereby changed the environment. Technology is partly responsible for explosive population
growth and for the resulting damage to earth’s resources. The industrial revolution caused a rapid
increase in the population growth, as oil and gas fuel were exploited for our use. There is a clear
link between the problems of global warming and overpopulation, as increases in CO2 levels
follows growth in population. The report summary also says that global warming is likely to
continue for centuries, and that it is already too late to stop some of the serious consequences it
will bring even if mankind could somehow hold the line on greenhouse gas emissions worldwide
today.
Carbon dioxide gas generated by man’s burning of fossil fuels and the forests is responsible for
about half the greenhouse gas warming. Other gases (CFCs, methane, nitrous oxide) are

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Anonymous
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Anonymous
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Anonymous
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