Many people hear about atmospheric ozone depletion and wonder why we don't simply replace the ozone that has been destroyed.  Knowing about chlorofluorocarbons and knowing how catalysts work, explain how this would not be a lasting solution.
214786
ozone is naturally replaced anyway, but the reaction between chlorofluorocarbons is much much faster than the rate of ozone production (free radicals on chlorine molecules extremely reactive, about 1 million times more reactive than the oxygen atoms involved in ozone production) so the rate of depletion would still be higher.
323868
it is a little of both. yes the earth has heated but weather goes in circular movement. so there are periods of time when the earth heats up and then cools down. yes we are polluting the air and are loosing ozone, but the biggest factor is from methane gas produced by farm animals. we (Christians) are suppose to be good Stewart's of Gods gifts to us. so we need to learn to recycle, conserve and use the planet wisely. one of the things that would help the most is just planting trees. have an cooling effect on earth.
26697
Ozone is produced by sunlight. There is less light at the poles (due to the earth's tilt), therefore there are holes there. Very little to do with man made gasses at all. Just one more "theory" with little or no basis in truth.
281400
1 and 2: http://en.wikipedia.org/wiki/Ozone\n3: http://archive.greenpeace.org/ozone/gallery/  (Greenpeace)\n4: I can't find anything for this one.  Sorry.  From what I know, however, most companies that makes things like refrigerators, air conditioners, and aerosol cans have altererd their practice, either out of good PR or by governmental mandate (not sure which).\n\nSorry I couldn't help more!
4088
You could use a catalyst to turn CO2 into a oxygenate.\n\nPlants would be the most efficient and cheapest way possible as far as I know. But plants won't just grow on mars, you would need to make the conditions suitable for plant life to survive. I think they were talking about man-made global warming to increase the atmosphere and warm it up for possible teraforming. \n\nAlso, there is water on mars already and why would you want it to rain carbon?
508494
No, it's an endothermic reaction meaning you need to add heat (but no necessarily a flame) to drive the reaction. The only way it would react with oxygen in the atmosphere is if the outside temperature where hot enough to drive the reaction. Of course, we'd all be dead, so we couldn't see it.
134121
Earth isn't being destroyed, everyone knows that unless they are morons.  Earth doesn't care if we deplete the ozone- people do.  If the water rises, people's overpriced homes go away- poo poo.  Earth was fine before people crawled out of the water, and will be here after people go to the molten core.  Earth is just some Aluminum, Carbon, etc. (all names we make up).  Sad, but true.  If you seek comfort- read the Bible, that's what it is there for.
129085
You have a misconception as to what an ozone layer is.  Ozone is a gas and is found throughout the atmosphere, even at ground level.  The ozone layer is the range in the atmosphere where ozone levels are the highest.  Oxygen O2 is present in the ozone layer as well (as are all other atmospheric gasses).  You should also note that in the ozone layer there isn't actually a whole lot of ozone, just more than there is anywhere else.  I think it's around 5 parts per million; meaning there is 1 molecule of ozone for every 200,000 other molecules.  There isn't a blanket of ozone, it's just an area where ozone is 5-10ppm instead of 1ppm or less.  \n\nWhy does most of it stay where it is?  Ozone is a somewhat unstable molecule and the same mechanism that typically forms ozone also breaks it down.  Simply, O2 gets hit by some photons of the right energy (some kind of UV light) and is split into O and O, one (or both) of those O's bonds to another O2 molecule to form O3, ozone.  Sooner or later, that O3 gets hit by the right energy of UV light and one of the O's break off to form O2 and a spare O which will find another O2 to bond with and repeat the cycle.  A small percent of the ozone does drop into the statosphere (where we live).
206192
CFCs aren't manufactured anymore, but tonnes of it still floats around in the atmosphere.  Since the CFCs causes chain reactions between ozone molecules.. even a lingering amount of CFCs will keep breaking down Ozone in the stratosphere.  Also, CFCs are still present in older models of refrigerators...and most likely people will not go through the hassle of extracting the CFCs before taking it to the dump.
367427
Phenols oxidize to quinione or radical species which readily form stable products by either self coupling or cross coupling with other molecules.  Your molecule is not decomposing, but rather reacting to yield new molecular species.  This is a one-way ticket and you won't get your phenolate back.\n\nRead the last six or seven sentences of the "environmental fate" section of the reference below.
48383
I believe they act as a catalyst for the reaction: 2(O3) -> 3(O2)\n\nNote that because they act as catalysts they are not consumed in the reaction, so the CFCs that are already in the atmosphere are there to stay.
174007
Ozone spontaneously decomposes.  If we filled all the holes, the ozone would turn to oxygen in a matter of minutes and the holes would be back.  "Holes in the ozone layer" are a myth propogated by those who would like to reverse the industrial revolution, but who would still insist on driving their BMW's.
616949
Wow that's tough, god luck with everything. It doesn't really seem fair! Um..I think you messed up your question "i dont mind the first two but i have no idea what to say about the first one"? I think you mean the last one, so I'll write about that. If that's not what you meant then nobody loses lol because then you'd just have more ideas.\n\nIs science a good thing or a bad thing? \n\nWell, I'd say it's a good thing - just think of all the new medical procedures that can be done because of modern science. One day, maybe there will be a cure for every disease. This could only happen if scientists continue their research. Imagine what the world would be like without science. We, as a society, wouldn't have the tools to understand the environment and why things happen the way they do. Science helps us expand our intelligence in a very large way. If it weren't for science, nobody would have ever found out that there was actually a hole in the ozone layer (a part of earth's protective atmosphere that filters out harmful UV rays from the sun), and we wouldn't know about how polluting the earth can make the hole bigger. We wouldn't know about global warming/climate change and how to stop it from happening so fast.\n\nHope that helped...and I hope that's the question you meant ;)
576945
Ozone is created anytime there is a high amount of energy supplied to oxygen.  The smell after a lightning strike, for instance, is pure ozone odor\n\nAs for the ozone layer I am not sure how you could set that up in lab, but I am betting just a box of ozone will behave in a similar way.  be sure to recreate the temperature and pressure conditions and you might want to get a UV lamp too
491567
If the cyclopentane is in excess, then that will tend to limit the reaction to one H being replaced by a Br atom.\nIf the proportion of Br is increased, then more H atoms can be substituted.
406865
the ozone deplation allows more rays to enter the earth's atmosphere.  Which then heats the atmosphere and raises the temps at the polar ice caps which melt.  The melted polarcaps will spill into the oceans that will spill over land.  Do you see where this is going.
250529
Well, actually, the atmosphere is currently about 80% nitrogen and 20% oxygen.  \n\nThere's nothing the human race could do, such as releasing balloons, that would convert the atmosphere to helium.  It's just to big!\n\nHelium has little effect on organic life, because helium is inert -- it doesn't react with anything!