CFC-silver+class+'09

= Public Service Announcement = toc

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=Abstract = The chemical we were is CFC (Chlorofluorocarbon). Humans use this chemical as a refrigerant, cleaning solvents, aerosol propellants and in the manufacture of plastic foams. CFC’s are used in products such as air conditioner’s, refrigerators, and some automatic fire systems. Although CFC affects humans in a harmful way, there are also some benefits from it. CFC is nontoxic, nonflammable and can be readily converted from a liquid to a gas and vise versa. It is also odorless, colorless, non-corrosive and chemically un-reactive. Because of its effect on the atmosphere CFC’s are banned in the U.S.

As explained earlier CFC’s do have benefits, but it is also very dangerous to humans and our environment. It has a bad affect on humans because it causes Ozone depletion. As the CFC interacts with the atmosphere it causes incidences of Ultraviolet radiation and reaches the earth’s surface. Exposure to ultraviolet radiation downs the appearance of aging skin, and causes skin cancer. It also decreases food production and makes the human eye become cloudy and scatter light so that a person’s vision is impaired. The Immune, respiratory, and aquatic systems are harmed, as well as biological organisms. Not only do humans get affected but the environment takes a hit too. CFC causes degradation of plastic and paints, and it increases smog in some urban areas. CFC’s are 15 percent responsible for the greenhouse effect, which increases global temperatures and sea levels to rise. The increase of sea levels and temperatures lead to frequent droughts, heat waves, polluted water supplies, and tropical diseases in the northern latitudes. The Government has banned CFC in the U.S.

We think that CFC should be banned and people in the U.S. should try to decrease the amount of CFC that goes into the atmosphere if we can. CFC’s are important for using things like air-conditioners and automatic fire systems but the cons of CFC outweighs the pros of it in this situation. If actions should be taken we think that there should be new ways to make air conditioners and fire systems. People are putting something that is very dangerous into are air and what we need to breathe in and out and that should be stopped.

=Background = **How/why do we use this chemical? ** We use this chemical as a refrigerant, a cleaning solvents, aerosol propellants and in the manfacture of plastic foams.

It is used in air-conditoning, refrigerators, and some automatic fire-fighting systems.
 * What products is it used in?**

It is nontoxic, nonflammable and can be readily converted from a liquid to a gas and vice versa. It is also odorless, colorless, non-corrosive and chemically unreactive.
 * What benefits does this chemical offer these products **?

CFC is in the atmosphere accumulate in the startosphere. It depletes stratospheric ozone**Is it banned anywhere? **CFC is banned in the U.S. =Summary = There are major costs of CFC like the harmful affects on a human being such as causes of skin cancer, less food production, harms to the Immune, respiratory and aquatic systems and biological organisms. People can make a case that CFC’s damage mostly everything in the world because it also has a bad affect on any environment. It increases smog, sea levels and global temperatures. This all could lead to more heat waves, droughts, polluted water supplies and tropical diseases in the northern latitudes. But there are pros that come with CFC's also. The good things about CFC is that its non toxic, non flammable, odorless, colorless, non-corrosive, chemically un-reactive, and can readily be converted from a liquid to a gas and vise versa. From doing research on this chemical we decided we would choose to ban the chemical in the U.S. like the U.S. government chose to. We cannot speak for other countries but if we are in charge CFC would be banned.
 * Where in the world is it used? **

=Health Implications = **What are the possible dangers associated with this chemical?** CFC’s cause Ozone depletion. CFC’s realeased into the atmosphere, and interacts witht the. As this takes place the CFC’s release chlorine atoms. When the chlorine atoms rise into the atmosphere they attack and destroy parts of the ozone layer. A single chlorine atom can destroy thousands of ozone molecules.

**How, specifically, does this chemical affect the body?** CFC’s effect on the Ozone increases incidences of Ultraviolet radiation reaching the earth's surface under the ozone holes. Ultraviolet radiation has a direct effect on humans.

Exposure to ultraviolet radiation downs the appearance of aging skin. It can cause all types of skin cancer. It also has an effect on the human eye when lens of the eye becomes cloudy and scatters light so that vision is impaired. CFC causes a decrease of food production.
 * What human body processes are affected by this chemical?**

** Imuune System, and respiratory system**.** Does harm to aquatic systems, and biological organisms. =Environmental Implications = **What specific environmental systems/processes does your chemical interact with?** CFC increases smog in some urban areas and causes degradation of some plastic and paints. CFC’s happen to account for 15 percent of the chemicals responsible for the greenhouse effect, which threatens to increase global temperatures and causes sea level to rise.
 * What human systems are affected by this chemical? (eg reproductive, endocrine)

**How long does it take to degrade?** CFC takes bout 40 or more years to degrade. CFC is disposed of by it being man made. Once the chemical is made, parts of it are released into the air. Also once objects that consist of CFC that are take apart, the CFC releases into the air. Then makes its way up to the stratosphere. // **-Include at least 3 balanced chemical reactions.** // CF**2**Cl**2*** + UV => CF**2**Cl + Cl Cl + O**3** => ClO + O**2 ClO + O => O **2 **+ Cl**
 * How does the chemical interacts with the environment? ** Since CFC’s increase global temperatures and causes sea levels to rise this leads to more frequent droughts, heat waves, polluted water supplies, and tropical diseases in northern latitudes.
 * What happens when this chemical degrades? What byproducts are formed? ** CFC cannot be degraded. Scientist believes that it’ll take at least 40 years or more for CFC to degrade.
 * How is it disposed of? **

=<span style="color: rgb(255, 255, 255); background-color: rgb(143, 255, 162); font-size: 120%;">Bibliography = [|http://www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0023689.html] [|http://www.ciesin.org/TG/OZ/cfcozn.htmlhttp://www.esrl.noaa.gov/gmd/hats/publictn/elkins/cfcs.html]

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