Which chemical is responsible for ozone layer depletion?

Answer 1

This has been answered in other categories: # Water vapor (H2O) - it both blocks one route of ozone formation (by stabilizing N2O* which could otherwise form ozone), and it provides a new decay path for ozone (by forming H2O2). # CFCs - photocatalytically breaks ozone down, and hangs around a while to do it again, and again.

Answer 2

Water vapor. Older non-flammable fire-fighting foams and propellants, insecticides and herbicides.

Chloro-fluorocarbons (also known as CFCs).

See "What is causing the depletion of the ozone layer?" in the "Related questions" section below.

Answer 3

Chlorofluorocarbons describe a variety of chemicals involved in ozone depletion. These chemicals have been used in propellants and refrigerants for years until they were phased out in the 70's and 80's.

Two common chemicals used in refrigerators, dichlorofloromethane (R-12) and dichloroflouromethane (R-22) were released into the atmosphere daily whenever a refrigerator needed to be serviced. Each refrigerator contained only a few ounces and cycled for years within the refrigerators' sealed system. However, once the sealed system broke, the gas was released into the atmosphere without any means to get it back. In response, some service guy came to the house, fixed the leak, and puped more R-12 to repair it . This happened at least once over every refrigerator's life cycle, in 360 million households, and with four or five ounces lost on each break, it released tons of this substance into the atmosphere.

Chlorofluorocarbons are popular as they are easily converted from a liquid to a gas because the boiling point is well below zero degrees. The gas is easily pressurized causing it to condense to liquid, when the pressure is released, the liquid boils thus moving heat. Because its easy to convert to a liquid it can store a greater amount of gas than oxygen thus being attractive to manufacturers of propelled goods. Manufacturers of propelled goods used these gases as late as the early 80's because this pressurized liquid was more dense than standard air compression. It took alot less pressure to condense a chlorofluorocarbon to a liquid state and it could store a lot more product than oxygen alone. Therefore it was a cheap, safe method to propel deodorant.

Another reason they phased the chloroflorocarbons out involved its easy conversion into nerve gas. All one had to do was burn a chemical like R-12 and one would get a gas that when inhaled would cause brain damage. It became in the best interests of our government to find a new gas to put in refrigerators when an easily purchased gas could be used by terrorists through the ventilation system of a major building.

Answer 4

ODS or CFC's are responsible for ozone depletion. They react with ozone to deplete it.

Answer 5

CFC are responsible. they react with ozone and deplete it.

Answer 6

Synthetic chemicals cause depletion. CFC is an example.

Answer 7

methane helium and all the other gases are the main reason all so green house gases

Answer 8

The major cause of ozone depletion are CFC's. They react with ozone to decompose it and thus deplete the layer.

Answer 9

The chemicals responsible for depletion of ozone are CFC's. These CFC's are the ones responsible for most of the depletion of layer.