Essays Tagged: "CFC"


ection.Scientist used their new technology and recorded ozone level findings. Chlorofluorocarbons, (CFCs) were discovered in high concentrations over Ireland that originated in London. Testing in the ... ntrations over Ireland that originated in London. Testing in the North Atlantic unexpectedly showed CFC concentration. The detection of CFCs was not expected in the North Atlantic because the area was ...

(12 pages) 331 0 4.8 Mar/2002

Subjects: Science Essays > Environmental Science


frigerants. He found what he was looking for in the form of two compounds: dichlorodifluoromethane (CFC-12) and trichloromonoflouromethane (CFC-11). In both compounds, different amounts of chlorine an ... ne and fluorine are combined with methane, which is a combination of carbon and hydrogen. These two CFCs were eventually manufactured by E.I. du Pont de Nemours and company, and, under the trade name ...

(5 pages) 83 0 3.4 Mar/1997

Subjects: Science Essays > Chemistry

Ozone Depletion

chemicals in question are numerous, but the two gaining the most attention are chloroflurocarbons (CFC's) and carbon tetrachloride. CFC's have a wide range of uses, but are popularly used in aerosol ... s and cars (Singer and Crandall npg). Carbon tetrachloride is one of the major components in making CFC sotheir damage is similar. When they inter the outer atmosphere,They react with ozone chemicals ...

(3 pages) 56 0 3.0 Dec/1995

Subjects: Science Essays > Environmental Science

CFC'S detroy the Ozone

- -Cfcs Cause Deterioration of the Ozone LayerThe deterioration of the ozone layer , caused by Cfcs, en ... e Ozone LayerThe deterioration of the ozone layer , caused by Cfcs, endangers the lives of humans'. Cfcs have a diminishing effect on the ozone layer. Furthermore, the deterioration of the ozone cause ... e ozone layer form a shield that protects life on earth from the dangerous and even deadly UV rays. Cfcs affect this process.Chloroflourocarbons (Cfcs) are man-made chemicals that were invented in 192 ...

(9 pages) 72 0 3.8 Jan/1996

Subjects: Science Essays > Environmental Science

Our radiant planet - depletion of the ozone layer

nd/or bromine that lead to ozone destruction. The largest group among these are chloroflurocarbons (CFC's). At ground level, these molecules are very stable and have many uses in industrial and domest ...

(4 pages) 83 0 5.0 Jan/1996

Subjects: Science Essays > Environmental Science


Chlorofluorocarbons (CFCs) are very common coolants that are used in air conditioners, refrigerators, and spray cans all ... e world. They are severely needed for many of today's basic household necessities. The problem with CFCs, however, is that their ability to float high into the atmosphere, which eventually leads to de ... which eventually leads to depletion of the ozone layer. There is a lot of controversy over whether CFCs should be used, because of their danger in reducing the amount of ozone. It is clear, however, ...

(3 pages) 128 3 4.6 Feb/2003

Subjects: Science Essays

Describes in simple terms the problems facing the ozone layer, including the problem of CPC's and the emergence of a "hole"---includes bibliography

arises that not all scientists, and other people for that matter, believe that chlorofluorocarbons (CFC's) are enhancing the problem, which is the commonly accepted theory. Yet before the problem can ... 974, Mario Molina and Sherwood Rowland jointly published an article in which they hypothesized that CFC's were even more damaging to the ozone layer than nitrogen oxides. Shortly after, a "hole" was d ...

(8 pages) 87 1 5.0 Mar/2003

Subjects: Science Essays > Atmospheric Sciences

Fake Press Release Intro to PR.

osphere. Green house gasses include Carbon Dioxide, Methane, Ozone, Carbon Monoxide, Nitrous Acids, CFC's (Chloro Fluro Carbon, most commonly found in aerosol cans) and Oxygen. These chemical gasses a ...

(2 pages) 109 0 3.0 Jul/2003

Subjects: Businesss Research Papers > Marketing

Ozone Layer Speech Outline

ade my audience that the "ozone hole" is not caused by man and therefore requires no policy against CFC's.Central idea: The ozone layer/"hole" is caused by fluct. in the environment and CFC's are litt ... is caused by fluct. in the environment and CFC's are little if any of the cause of ozone depletion. CFC's are very heavy, they stay close to the ground and do not affect the stratosphere. Volcano's pu ...

(3 pages) 153 1 2.7 Mar/2004

Subjects: Science Essays > Chemistry

Global Warming: Serious But Overlooked Threat

r it to reach the upper level, though, is to be carried there by some other chemical. That is where CFCs come into play. CFC, chlorofluorocarbons, carry the chlorine to high enough altitudes so that i ... chlorofluorocarbons, carry the chlorine to high enough altitudes so that it can destroy the ozone. CFCs are used to make urethane shoe soles, foam car seats, pillows, mattresses (CFCs as blown foam), ...

(6 pages) 121 0 3.5 Mar/2004

Subjects: Science Essays > Atmospheric Sciences

Novel Dosage Forms

od you are using.Dry powder inhalers are becoming more common, in part because they do not use the "CFC" propellant found in an MDI. (CFCs damage the ozone and will be phased out of MDIs in the next f ...

(5 pages) 24 0 5.0 Apr/2004

Subjects: Humanities Essays > Health & Medicine > Drugs

Gun Control in Canada - Are Strict Registration Rules Working?

1892, when there was a minimum sentence of six months for anyone who carried a firearm. ( Similar to most laws, it will change and ...

(7 pages) 45 1 4.7 Dec/2004

Subjects: Social Science Essays > Controversial Issues > Gun and Weapon Control

Environmental protection

layer which is caused by smoke from factories, car exhaust fumes, aerosol cans 'cause they contain CFC. Global warming is an increase in world temperature caused by an increase in carbon dioxide. Aci ...

(1 pages) 52 1 3.0 Mar/2005

Subjects: Science Essays

The Ozone Layer

he ozone. They were used in refridgerators, air conditioners, spray cans, stirofoam, and packaging. CFC's were good because they could be easily converted to a liquid or a gas easily, and back, their ... o a liquid or a gas easily, and back, their non-toxic, and non-flammable. The chlorine molecules in cfc's can break down a possible hundred thousand ozone molecules before they themselves are destroye ...

(1 pages) 447 0 0.0 Oct/2006

Subjects: Science Essays > Environmental Science


rom getting skin cancer and cataracts. Also, by recycling vehicle equipment we can help to conserve CFC'S. CFC-12 is a leading CFC in the depletion of the environment. It is used in many refrigerators ... er from depleting even more. We can ask air conditioning and car salesman if their products contain CFC'S. We can also stop burning fossil fuels. If we cooperate, we can save the o-zone before it is t ...

(1 pages) 7 0 0.0 Apr/2001

Subjects: Science Essays > Chemistry

Review On "The Precious Envelope"

on, chief of atmospheric science at NASA, the major cause of ozone depletion is Chlorofluorocarbon (CFC), which is found in coolants for air conditioners, refrigerators, and cleaning solvents for comp ... s, refrigerators, and cleaning solvents for computer components that rise into the atmosphere. When CFC's rise into the air, chlorine is broken off by UV rays and can breaks down thousands of ozone mo ...

(3 pages) 1013 0 3.0 Nov/2001

Subjects: Science Essays > Environmental Science


se gases released into the atmosphere is warming the earth's climate. Gases such as carbon dioxide, CFC and methane are the most released gases due to daily human activities. Exhaust from automobiles, ...

(5 pages) 71 1 3.8 Mar/2008

Subjects: Science Essays > Environmental Science

Chemistry of the Stratosphere

o was interested in the global spread ofgasses in the troposphere, developed a method for detecting CFCs inthe troposphere. He detected small concentrations of CFC 11 in ruralareas, far away from pote ... e gas would accumulate and move in the atmosphere. SherwoodRowland and Mario Molina found that when CFCs reached the tropospherethey are broken down by the absorption of UV light.Years after these dis ...

(4 pages) 14 0 3.7 Oct/2008

Subjects: Science Essays > Chemistry