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Ozone Hole Getting Smaller

snark42 writes "According to Reuters and some other sources the hole in the ozone layer shrank 20% this year to a mere 9 million square miles. Of course scientists caution this would have to continue for at least a couple more years to be a trend or anything to get excited about."

24 of 352 comments (clear)

  1. hrmmm by rdc_uk · · Score: 5, Interesting

    20 years from now, we'll have discovered there's a natural grow/shrink cycle we never knew about...

    1. Re:hrmmm by cameldrv · · Score: 4, Informative

      Volcanoes don't produce CFCs. They produce sulfur, which depletes ozone, but the long-term ODP of the sulfur compounds from volcanoes aren't anything like CFCs, which stick around for a very long time. What we are seeing now is probably primarily the result of the 1976 ban on CFCs in aerosol cans.

    2. Re:hrmmm by k98sven · · Score: 5, Insightful

      Nobody ever proposed such a thing.

      First, if you're going to be a smart-ass perhaps you should get your facts right. Volcanos don't spew CFCs. They spew other chemicals (mostly sulphur compounds) which destroy the ozone layer.

      You're argumenting that since volcanos damage the ozone layer, it's OK if we humans contribute further to the destruction.

      That's stupid. We can't do anything about the former, we can certainly do something about the latter. Why shouldn't we? UV radiation has been an increasing problem in the polar regions.
      I live in Sweden. The skin cancer rate here has tripled since the 50's.

      By the same rationale, we shouldn't bother about nuclear waste either. After all, there's natural background radiation out there which causes cancer too.

    3. Re:hrmmm by Zemran · · Score: 4, Funny



      I plan to fill all volcano craters with empty MacDonalds packets so that when a volcano starts to get hot the package melts and blocks the crater with molten plastic!!!

      (well if you can talk bollox, so can I)

      --
      I love stacking my barbecues in the shed at the end of summer - you can't beat a bit of grill on grill action.
    4. Re:hrmmm by jsebrech · · Score: 4, Informative

      That does sound very convincing when you first read it, because the author is an excellent politician. But you should beware of people who use strawman arguments (the young man at the panel discussion) and unfounded ad hominem accusations (accusing the government of being infected by irrational environmentalists who want to destroy industry) in support of their case.

      Anyway, here's a generic rebuttal to the ozone naysayers.

      Any scientific issue, no matter how rooted in facts it is, always has naysayers. Even the round earth theory had considerable opposition. For someone to dispute accepted scientific theory requires extraordinary evidence, and frankly this james p. hogan doesn't provide much in the way of actual evidence.

      Oh, and in general, paying attention to whether a text contains logical fallacies is very helpful too in weeding out truth from falsehood.

  2. Hope this isn't used as an excuse... by kentmartin · · Score: 5, Insightful

    While this is good news, I hope it isn't seen by governments as an excuse to ease their environmental burdens in favour of bowing to economic/corporate pressures, and, I really hope it isn't seen as yet another excuse by the US government to duck out for even longer on signing the Kyoto Accords.

    I realize the above accords don't directly affect the ozone layer, but, ask anyone on the street - the hole in the Ozone layer and the "Greenhouse Effect" are the same thing right? Maybe the hole lets more heat in or something...

    It is a sad state of affairs when one feels so cynical, that the first thing that occurs when a hint of good news comes along, is, how will those in power exploit this?

    1. Re:Hope this isn't used as an excuse... by Keebler71 · · Score: 4, Informative

      Actually, the US has signed the Kyoto protocol, however it was a purely symbolic gesture by the Clinton administration. The Senate had voted 95-0 (and yes, Kerry was one of the 95) for a resolution stating that the US should not sign the protocol. Since the senate is the body with the US government that ratifies treaties, neither the Clinton or Bush administration pushed the issue further.

      --
      "It takes considerable knowledge just to realize the extent of your own ignorance." - Thomas Sowell
  3. Pardon my ignorance. by Moby+Cock · · Score: 4, Interesting

    This may be a stupid question *but*...

    Why can't we 'reseed' the ozone layer? We can make ozone in a lab, so why don't we get some high flying aircraft and strap some ozone filled bottles to the fuselage and start spraying? It'd be like dusting crops only a lot different.

    Although, it is good news that the hole is smaller.

    1. Re:Pardon my ignorance. by PrionPryon · · Score: 5, Informative

      Ozone is destroyed in a on going chemical process that is balanced by the creation of new ozone through natural mechanisms. The equilibrium level ozone is what we get. With CFCs introduced the equilibrium levels get shifted to lower concentrations. The introduction of man made ozone would be of little consequence as it couldnt be done a scale necessary to offset the CFC destruction. It would also need to be a continuous input which would make it very expensive and time consuming. A better plan, as we have done, is to attempt to reduce the CFCs and shift the equilibrium levels back to more favourable conditions.

    2. Re:Pardon my ignorance. by Dun+Malg · · Score: 4, Informative
      Why can't we 'reseed' the ozone layer? We can make ozone in a lab, so why don't we get some high flying aircraft and strap some ozone filled bottles to the fuselage and start spraying? It'd be like dusting crops only a lot different.

      Ozone (O3) is basically created when UV light hits O2 molecules. When there's less ozone to block the UV rays, it stands to reason that more ozone would be created because more UV radiation is getting down to the level where the atmospher contains more O2. Even those that believe the hole is caused by human activity don't describe it as a problem caused by lack of ozone production; rather, it's theorized that atmospheric chlorine is breaking the ozone down faster than the UV + O2 interaction can replace it. Suggesting we "spray ozone" completely fails to appreciate the scale at which this is happening. We're talking BILLIONS OF TONS of ozone. It's like suggesting that we fight a 100,000 acre wind-driven wildfire with bucket brigades and garden hoses.

      --
      If a job's not worth doing, it's not worth doing right.
  4. Science news dilemma by squaretorus · · Score: 4, Insightful

    Reporting this suggests everything will be OK in 5 years - 20% in a year - just 80% to go hey!!

    Of course this could be nothing to do with anything - and simply be an anomoly, a measuring error, a rogue reading, or true. Until everyone has a basic degree of scientific understanding this kind of news will hit the headlines and be presented as a Good Thing. Which is isn't - its neither good not bad.

    A bit like the medical researcher on the radio every few weeks being introduced as talking about a 'newfound cure for cancer' and saying 'this is certainly an exciting development' being asked 'so when will it actually be used to cure cancer' and having to say 'well... possibly never, ... certainly 20 years, actually I never claimed.' 'THANK you very much its 8:59 time for traffic'

  5. Re:drop in pollution levels? by PrionPryon · · Score: 5, Informative

    International accords have acted to reduce the amount of CFCs being released into the atmosphere. These are the pollutants that affect the chemical ozone cycle. So a decreases in them would permit ozone to stick around. People in Antarctica do get sunburnt very easily, as do people in new zealand and chile when the hole is over their region. Chile has many school programs preventing children from going outside during hole episodes.

  6. Re:The Return of Cheap Freon! by base3 · · Score: 4, Interesting

    Interesting how Freon became dangerous right after DuPont's patent on it expired. There is nothing new under the Sun.

    --
    One CPU cycle wasted on digital restrictions management is ONE TOO MANY.
  7. Re:Kyoto isn't ment to work by jeffehobbs · · Score: 5, Insightful


    Please tell me how exempting the fastest growing, most poluting economy on the face of the planet will make one bit of difference.

    Progress that's not all-encompassing still continues to be progress.

    ~jeff

  8. According to Reuters by egon_b · · Score: 4, Informative
    In 2002, the ozone hole suddenly shrank, raising hopes it had turned the corner and was starting to close but some scientists later put it down to an abnormality caused by atmospheric conditions.
  9. Re:What? by Dun+Malg · · Score: 4, Informative
    How can this be possible. In recent years, if anything our environment has gotten worse. How could the ozone possible be healing itself?

    Because ozone is created by the interaction of O2 and UV radiation. It's not some finite mass of rare elements. It's O3. The reason it's "coming back" is that human activity has a negligible effect upon it. The "hole" is a cyclical phenomenon more closely related to solar activity than anything else.

    --
    If a job's not worth doing, it's not worth doing right.
  10. Re:ahhh by DAldredge · · Score: 5, Informative

    The entire planet didn't. China still uses very large amounts of CFCs.

    An example, google for more.

    THE PROCESS TO phase out the use of CFCs in polyurethanes from the 1,000 or more foam factories in China has started to accelerate.

    The phase-out is being undertaken in accordance with the Montreal Protocol, which established a timetable for developing countries to phase out the use of CFCs by the year 2010. With financial support from the Multilateral Fund supplied by the United Nations, it is estimated that about 10% of Chinese foam processors have now substituted CFCs with other foaming agents, such as pentane, C[O.sub.2] and water. Companies that have completed ...

  11. This has already been suggested... by innerweb · · Score: 4, Insightful
    ...But, once again, man causing a more extreme situation than what would have existed before is still not a good thing. Ozone depletion has a deadly potential... just think Microwave Oven Earth. Though I would be surprised if there were not a natural cycle like all things in nature (magnetic poles, ice ages, volcanic activity ...), we do not need to play baby God with it.

    The Earth is fairly resillient, much more so than we humans are. The Earth will survive just about anything we do to it, but we are at risk. The argument that there are no (or minimal) dangers ignores the fact that skin cancer exists. It ignores the fact that there is a hole in the ozone. The Montreal Protocol has been a major step forward to eliminating/minimizing those chemicals that we know deplete the Ozone layer.

    The other thing that may contribute to the Ozone layer growing back would be global warming, as the ozone depletion effect requires very cold temperatures to do the spectacular damage it has done to the pole. (see Univeristy of Cambridge.)

    Some interesting facts:

    • 1 person dies of melanoma every hour.
    • One in five people will develop skin cancer.
    • UV exposure increases your risk of going blind, causing cateracts and macular degeneration.

    InnerWeb

    --
    Freud might say that Intelligent Design is religion's ID.
  12. Aquanet from 1980s by vcjim · · Score: 4, Funny

    Generally, it takes Aqua-net approximately 15 years to escape the earth's atmosphere. The residual Aqua-net from 1980's groups like the Cure and Poisen , as well as teenage girls, who are now fat 30-somethings, has escaped the stratosphere. So long as fashion trends to not revert to high bangs and glam-band hair... we will survive.

  13. Re:Kyoto isn't ment to work by tkittel · · Score: 4, Insightful

    Why do you think that China is the most polluting economy? Of course having ~1 billion inhabitants it is going to be quite high up there, but the worlds most polluting economy must in all fairness said to be the US, where 4% of the worlds population produce 25% of the worlds greenhouse gases (according to this link)

    Of course wikipedia tells us that China comes second.

  14. Re:ahhh by tsg · · Score: 4, Insightful

    Science has not, nor will it ever save my life. I am going to die, and science can not stop that. We're all dying.

    Yes, but science has greatly increased the lifespan and quality of life of the average person. Unless you don't consider that worthwhile...

    It's like the housewife who goes to the mall to buy several pairs of shoes. "I saved fifteen dollars!" "Yes dear, but you spent $70."

    If she was going to buy the shoes regardless if they were on sale, then she did save $15.

    --
    People's desire to believe they are right is much stronger than their desire to be right.
  15. Scientific Bias by Zoc_All_Alone · · Score: 5, Insightful

    So, lemmie get this straight:
    The hole gets 2% bigger, scientists freak out, instantly blaming pollution and saying we need to change. Then, when the hole shrinks by 20%, "scientists caution this would have to continue for at least a couple more years to be a trend or anything to get excited about."

    Is it just me, or does it seem these scientists are protraying the facts in such a way to continue their funding?

  16. Ice shelves by Anonymous+Writer · · Score: 4, Insightful

    Could this have something to do with the increasing collapse of ice shelves in the Antarctic? Perhaps there is some relationship between the Ozone hole beginning to shrink and the collapse of the Larsen B Ice Shelf, which both coincidentally happened in 2002. Maybe the collapse and accellerated glacier movements triggered some environmental chain reaction that affected the Ozone hole, but in a superficial way that temporarily masks a continued climate change.

  17. Re:Kyoto isn't ment to work by Lars+T. · · Score: 4, Informative
    Umm, yeah, right.
    The current President, George W. Bush, has indicated that he does not intend to submit the treaty for ratification, not because he doesn't support the general idea, but because he is not happy with the details of the treaty. For example, he does not support the split between Annex I countries and others. Bush said of the treaty:
    "The world's second-largest emitter of greenhouse gases is China. Yet, China was entirely exempted from the requirements of the Kyoto Protocol. This is a challenge that requires a 100 percent effort; ours, and the rest of the world's. America's unwillingness to embrace a flawed treaty should not be read by our friends and allies as any abdication of responsibility. To the contrary, my administration is committed to a leadership role on the issue of climate change. Our approach must be consistent with the long-term goal of stabilizing greenhouse gas concentrations in the atmosphere."
    China emits 2,893 million metric tons of CO2 per year (2.3 tons per capita). This compares to 5,410 million from the USA (20.1 tons per capita), and 3,171 million from the EU (8.5 tons per capita). China has since ratified the Kyoto Protocol, and is expected to become an Annex I country within the next decade. The US Natural Resources Defense Council, stated in June 2001 that: "By switching from coal to cleaner energy sources, initiating energy efficiency programs, and restructuring its economy, China has reduced its carbon dioxide emissions 17 percent since 1997".
    IOW not only will China be subject to the requirements in a few years, they already made a larger reduction than the US has to make. And unlike the US, both China and India actually do use modern technologies for their new plants.

    The fact that Bush is scared just shows how much of a plan he has for economic growth.

    --

    Lars T.

    To the guy who modded me down from perfect to terrible Karma - Apple haters still suck