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2006-11-27 17:14:07 · 17 answers · asked by mailtoamit_vns 1 in Science & Mathematics Geography

17 answers

Well,carbon dioxide.

2006-11-27 17:15:17 · answer #1 · answered by Anonymous · 0 1

Chloroflourocarbons. Also called CFCs or freon.

Which is ironic, really, because these particular chemicals were originally designed to be completely and utterly safe. You start with methane (really reactive) and start replacing the hydrogens on it with chlorine and flourine. While the hydrogens break off easily, those other guys will cling to the carbon as if their lives depended on it. And practically speaking, chloroflourocarbons are one of the very LEAST reactive compounds you might find. So IN THEORY nothing bad should happen if you spray a bunch of it around.

And a LOT of it certainly was sprayed around. It was one of the main chemicals used as a refridgerant and solvent. Spray cans were filled with the stuff, jets used them to cool their engines, and freezers all around the world slowly leaked the stuff into the atmosphere.

The funny thing with the assessment that CFCs don't react with anything was the assumption of the kinds of conditions we're used to. As far as that went, the assessment was pretty much spot on. But when those guys wafted up outside of the atmosphere, it was a different story. Powerful radiation from the sun was enough to blast the molecule to pieces. And that's where the problems started.

You see, when you can get free chlorine out in the outer atmosphere, it can act as a catalyst. It turns ozone into normal oxygen without changing itself... meaning it can stick around to KEEP turning ozone into ozygen unendingly.

Normally these gases wouldn't get so far out. Other layers of the atmosphere would absorb them. But since the CFCs didn't react with just about anything, they had no trouble getting out there. And once it's there, it continues to destroy ozone until an air fluctuation carries it back down... this takes about two years (on average).

Of course, it's not JUST CFCs that do that kind of thing. But they are the biggest factor, and they are all completely our fault. Whoops.

2006-11-28 01:16:53 · answer #2 · answered by Doctor Why 7 · 1 1

CFCs (ChloroFluoroCarbons) are responsible for decaying the ozone layer.
The Chlorine in CFC reacts with the Oxygen in Ozone

2006-11-28 05:40:05 · answer #3 · answered by Santhosh S 5 · 0 0

To be simple, all the refrigerant gases containing fluorine molecule are responsible for ozone depletion. R11, R-12 and R-22. These are also called as chlorofluorocarbons.R-11 and 12 are very reactive compares to R-22.

2006-11-28 01:57:40 · answer #4 · answered by just a kid 1 · 0 1

Chlorofluorocarbons (CFCs), along with other chlorine- and bromine-containing compounds, have been implicated in the accelerated depletion of ozone in the Earth's stratosphere.

Not until 1973 was chlorine found to be a catalytic agent in ozone destruction. Catalytic destruction of ozone removes the odd oxygen species [atomic oxygen (O) and ozone (O3)] while leaving chlorine unaffected. This process was known to be potentially damaging to the ozone layer, but conclusive evidence of stratospheric ozone loss was not discovered until 1984. Announcement of polar ozone depletion over Antarctica in March 1985 prompted scientific initiatives to discover the Ozone Depletion Processes, along with calls to freeze or diminish production of chlorinated fluorocarbons.

Creation of the vortex sets the stage for the rapid depletion of ozone by catalytic cycles. A catalytic cycle is a series of reactions in which a chemical family or a particular species is depleted, leaving the catalyst unaffected. The odd-oxygen family, for example, is composed of ozone (O3) and atomic oxygen (O). In the presence of a chlorine atom, the net result is the conversion of an oxygen atom and ozone molecule to two molecules of molecular oxygen (O2). Chlorofluorocarbons (CFCs) themselves are not involved in the catalytic process; upon reaching the stratosphere, they are subject to higher levels of ultraviolet radiation that decompose the CFC and release atomic chlorine. The basic set of reactions that define the catalytic cycle involving chlorine and odd-oxygen appear below:

Cl + O3 ==> ClO + O2

ClO + O ==> Cl + O2

net result: O3 + O ===> 2O2

Chlorine (Cl) is initially removed by reaction with ozone to form chlorine monoxide (ClO) in the first equation, but it is regenerated through reaction of ClO with an oxygen atom (O) in the second equation. The net result of the two reactions is the depletion of ozone and atomic oxygen.

2006-11-28 02:12:53 · answer #5 · answered by Anonymous · 0 0

Chlorofluorocarbons, CFC's, are the major category of man-made holograms. The most common CFC's are foams, aerosols, refrigerants, air conditioners and solvents.

The link between CFC's and ozone depletion, and the major factors creating the antarctic ozone hole, are considered by most researches to be well established facts.

2006-11-28 01:54:25 · answer #6 · answered by danaluana 5 · 0 1

Cluoro Flouro Carbons(CFC'S) they are the gases used in refirgation sterliasation fodd freezing cosmetics etc, there are other gases such as Methyl Chloro form Halo Carbon Tetra Chloride which are causing depletion of Ozone

2006-11-28 01:42:19 · answer #7 · answered by Siddharth P 2 · 0 1

the ozone layer is NOT decaying. That's a bunch of hogwash so that the active and extreme environmentalist groups can earn more money.....
I won't get into it. It's too ridiculous.

2006-11-28 01:15:51 · answer #8 · answered by Anonymous · 0 1

chlorofluorocarbons emitted largely by many of the old refrigerants that we used to use,Before they were outlawed.These molecules will chain react with ozone particles and a type of chlorine gas is the result.

2006-11-28 01:25:47 · answer #9 · answered by MAC 2 · 0 1

The industrialized nations of the world but most responsible was and still is the USA!

2006-11-28 01:18:19 · answer #10 · answered by Nikolas S 6 · 0 1

It is cloroflourocarbons popularly abbreviated as CFCs, which are the mainly used in aerosoles and refrigerants.

2006-11-28 04:03:44 · answer #11 · answered by pravkas 2 · 0 0

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