Immortality Term paper
While the free essays can give you inspiration for writing, they cannot be used 'as is' because they will not meet your assignment's requirements. If you are in a time crunch, then you need a custom written term paper on your subject (immortality)
Here you can hire an independent writer/researcher to custom write you an authentic essay to your specifications that will pass any plagiarism test (e.g. Turnitin). Waste no more time!
The Ozone Layer: a Hole in the Theory.
Some scientists have proclaimed that the human race is slowly depleting the layer of ozone which protects us from ultra violet light. In reality, humans have very little control of the world in which we live. Scientific evidence has shown that there is very little depletion in the ozone layer and the contributions the human race makes towards this depletion is and always will be insignificant compared to nature. The theories of the depletion and what it would cause are flawed and contradictory.
Where and when did this global killing threat begin? It all began in the mid 1960's when the United States government began pursuing super sonic transports. These would be planes which would travel in the stratosphere, very close to the ozone layer. The first environmentalist complaints were actually of the noise factor. These large planes would be traveling in excess of the speed of sound. Subsequently there would be sonic booms heard on the surface (Singer). The arguments fell on deaf ears in Washington. The next objection came in the form of ozone depletion. A fleet of over 500 of these planes would ultimately destroy the ozone. This would allow more ultra violet radiation to fall to the earth and in turn skin cancer rates would sky rocket. That was more than enough for the federal government to get involved, they immediately canceled the project. At that time there was no study done to investigate these claims, but there has been since. The initial estimation was that a fleet of 500 SSTs would effectively reduce the ozone layer seventy percent. In the 1970's that number fell to ten percent. With the emergence of the Concorde, which is a SST, in the 1980's, studies were done that show the emissions from these planes actually insulate the ozone layer and prevent it from being depleted (Singer). There is irony in the fact that the initial claim of ozone depletion, actually turned out to aid it. This isn't the only piece of irony when it comes to the ozone.
The second part of the initial claim said that ultra violet light would fall on the earth and cancer rates would go up. One could claim that melanoma rate have gone up within the past years because melanoma rates have increased 800% since statistics were first collected in 1935. Unfortunately there has been no corresponding change in the ozone layer or the amount of UV light reaching the surface. To the contrary, UV levels have been on the decline at every test center (Singer). Also the fact that indoor workers have a twenty-one percent higher chance to get melanoma than outdoor workers, further supports the fact that UV rays themselves do not induce melanoma (Howard). Another piece of irony, the SSTs cause ozone depletion, which in turn cause UV rays to increase. And UV rays equal cancer, right?
Paragraph on the current measurements of the ozone and what scientists believe cause the changes in thickness.
When SSTs were no longer an issue the scientific community was still concerned about this claim of depleting the ozone layer. They began to look at what else could cause this depletion and at this time compiled a list of ozone gases. Ozone gases have now become a term associated with those awful gases which destroy the human race's only protection from the sun and it's deadly UV rays. What are these gases though? Where do they come from? The most commonly referred to of gases are CFCs. These gases are Fluorocarbons. CFCs come from commonly used items such as aerosol cans, refrigerators, and air conditioners. Believers in the depletion theory believe that humans release these gases and they go into the atmosphere and neutralize the chemicals that hold the ozone together. Thus holes begin to emerge and in turn the whole world is doomed. One study in 1959 stated that if the fluorocarbon industry continues to grow at it's twenty-two percent rate between 1960 and 1972, then by 1995 the ozone would be depleted by over forty percent (Ponte). Well the industry grew at over twenty-two percent during those years and yet there hasn't been a forty percent decrease in ozone. Not even a thirty, or even a fifteen and even ten is too large. In actuality the measurements now show a six percent increase (Bidinotto). Yes an increase! The other amazing fact is that in 1976 an Alaskan volcano spewed 570 times the worlds CFC production (Begely). That means in a matter of days this one volcano produced more CFCs than the human race has in the last 570 years. Some scientists argue that volcanoes can't actually propel these gases far enough into the atmosphere to cause any damage. If this is truly the case, how am I then supposed to believe that my little can of deodorant actually can? In trying to defend their claim they actually disprove what it was they were saying in the first place. The other major gas claimed to deplete the ozone layer is chlorine. This claim is very easy to discredit. Chlorine gas weighs two and a half times more than air. It would take tremendous amounts of force to put it high enough into the air to effect the ozone (Singer).
These facts, long hidden from the public's eye, didn't discourage politicians from creating regulations on CFCs. In 1978, the United states and other western nations, unilaterally banned the use of CFCs in all aerosol products (Ponte). This didn't last long though. The Japanese and the Europeans were not ready for this ban yet, due to two main reasons. Number one was the great cost to replace CFCs in all it's applications. The second was there was no replacement for CFCs in many of it's applications. But times change and technology advances, and thus in the early 1990's up sprung the Montreal Project (Howard). This was a multi-national project to reduce the amount of CFCs used in the world. There was a 300 page study done showing...
MLA Style
. EssayMania.com. Retrieved on 25 May, 2012 from
<http://essaymania.com/65589/immortality>
More College Papers
Immigration essay
Immigration has held a major role in shaping our
country. Immigrants have provided many things such
as customs, manufacturing, inventions, and
entertainment. Many people today don't realize how
greatly we have been affected by immigration. A
survey was given to ten people. The survey conta
Hydrothermal Vents essay
Imagine being on the ocean floor. You are in total darkness and in unbearable pressure. You would think that in this freezing environment there is no life, but there is. Eight years ago something was discovered that no one could even imagine. It was a source of life called a hydrothermal vent.
A hy
Hydroponics essay
Imagine being able to grow plants and/or crops everyday of the year in
smaller spaces without the use of any soil. Hydroponics is a soiless
agriculture that does just this. The idea for the use of plant growth without
any soil was developed in the eighteen hundreds. Hydroponic gardening is an
ol