Question

PLEASE READ CARFULLY

Argumentative essay "Is ozone layer important?"

Your project is an argument in a minimum of 1500 words, supported by reliable sources for your evidence, avoiding the things that make an argument weak (ambiguity, fallacies, hasty generalization, etc.)

PLEASE DO NOT COPY AN EXISTING ANSWER FROM CHEGG, THEY ARE ALL INCORRECT

In your own 1500 words (NO PLAGIARISM)

Answer 1

The ozone layer, also called ozone shield, is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.  

Depending on where ozone resides, it can protect or harm life on Earth. Most ozone resides in the stratosphere ( a layer of the atmosphere between 10 and 40 km above us) where it acts as shield to protect Earth's surface from sun's harmful ultraviolet radiation.  

Without the layer of ozone in the atmosphere, it would be very difficult for anything to survive on the surface. Plants cannot live and grow in heavy ultraviolet radiation, nor can the plankton that serve as food for most of the ocean life. The ozone layer acts as a shield to absorb the UV rays, and keep them from doing damage at the Earth's surface.  

Over the earth's lifetime, natural processes have regulated the balance of ozone in the stratosphere. A simple way to understand the ozone balance is to think of a leaky buucket. As long as water is poured into the bucket at the same rate that water is leaking out, the amount or level of water in the bucket will remain the same. Likewise, as long as ozone is being created at the same rate that it is being destroyed, the total amount of ozone will remain the same.

Starting in the early 1970's, however, scientists found evidence that human activities were disrupting the ozone balance. Human production of chlorine--containing chemicals such as chlorofluorocarbons (cfcs) has added an additional factor that destroys ozone. CFCs are compounds made up of chlorine, fluorine and carbon bound together. Because theyy are extremely stable molecules, CFCs do not react easily with other chemicals in the lower atmosphere. One of the few forces that can breakup CFC molecules is ultraviolet radiation. In the lower atmosphere, CFC s are protected from the ultraviolet radiation by the ozone layer itself. CFC molecules thus are able to migrate intact up into the stratosphere. Although the CFC molecules are heavier than air, the air currents and mixing processes of the atmosphere carry them into the stratosphere.

Once in the stratosphere, the CFC molecules are no longer shielded from ultraviolet radiation by the ozone layer. Bombarded by the sun's ultraviolet energy, CFC molecules breakup and release chlorine atom. Free chlorine atoms then react with ozone molecules, taking one oxygen atom to form chlorine monoxide and leaving an ordinary oxygen molecule. If each chlorine atom released from a CFC molecule destroyed only one ozone molecule, CFC s would pose very little threat to the ozone layer. However, when a chlorine monoxide molecule encounters a free atom of oxygen, the oxygen atom breaks up the chlorine monoxide, stealing the oxygen atom. and releasing the chlorine atom back into the stratosphere to destroy more ozone. This reaction happens over and over again, allowing a single atom of chlorine to act as a catalyst, destroying many molecules of ozone.

Ozone depletion.means more than just the natural destruction of ozone, it means that ozone loss is exceeding ozone creation  

Conclusion : Ozone layer is important and it is our responsibility to ensure depletion of ozone layer doesn't exceed the limit. Development is important for growth of civilisation however absolute check is required to ensure safety of life on earth and save it from the harm which can be caused by ultraviolet radiation from the sun. Ozone depletion is serious issue in world environment forums, and developed and developing countries are being asked by world bodies such as United Nations, to have control on the environmental pollution caused by industrial development.