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The ozone layer is safe
09-21-2010, 08:43 AM,
The ozone layer is safe
Quote:LEADING scientists say the ozone layer is starting to repair itself and will eventually give us much greater protection from skin cancer.

They say that phasing out almost 100 substances once used in such products as refrigerators and aerosols has stopped the layer from further depletion.

Ozone in the stratosphere is important because it absorbs most of the sun’s dangerous ultraviolet radiation, which can lead to skin cancer and eye damage.


Although it is not yet increasing again, the ozone layer outside the polar regions is, by the year 2048, expected to recover to the levels it was at 30 years ago.

The United Nations report, Scientific Assessment Of Ozone Depletion 2010, paints a much more optimistic picture than previous assessments and is the first comprehensive update in four years.

It argues that action taken through the Montreal Protocol, which began in 1987 and has introduced the reduction of harmful emissions, has helped to halt the damage.

Achim Steiner, UN under-secretary general and environmental programme executive director, said: “Without the Protocol, levels of ozone-depleting substances could have increased tenfold by 2050.

“This, in turn, could have led to up to 20 million more cases of skin cancer and 130 million more cases of eye cataracts, not to speak of the damage to human immune systems, wildlife and agriculture.”

News that the protective layer in the earth’s upper atmosphere has stopped thinning was widely welcomed last night.

Len Barrie, head of research at the World Meteorological Organisation, said: “The Montreal Protocol to control ozone depleting substances is working. It has protected us from further ozone depletion over the past decades.

“Global ozone, including ozone in the polar region is no longer decreasing but not yet increasing.”

Craig Bennett, campaigns director for pressure group Friends Of The Earth, said: “If we carry on doing the job that we are doing then we will restore the hole, but there is still along way to go.

“It shows that we can deal with big problems but Governments have to stay firm to the Montreal Protocol.

“There has been a huge time delay from the action being taken and the ozone layer not getting any bigger.

“It shows what is possible if Governments listen to scientists and look at scientific evidence.”

He added: “It’s a lot simpler issue than climate change but we can rise to challenges and should not despair.”

In 2010, reductions of ozone-depleting substances as a result of the Montreal Protocol, were five times larger than the targets of the Kyoto Protocol, the greenhouse emissions reduction treaty, adopted in 1997.

However, despite the good news in yesterday’s report, there was a warning that much was still to be done and complacency had to be avoided.

The scientists who compiled the UN report said one important challenge that still remained was to examine the complex links between ozone and climate change.

Changes in climate are still expected to have an increasing influence on stratospheric ozone in the coming decades, the report said. These changes would come mainly from the emissions of long-lived greenhouse gases, predominantly carbon dioxide, which are caused by human activity.

Ozone provides a natural protective filter against harmful ultra-violet rays from the sun, which can cause sunburn, cataracts and skin cancer as well as damaging vegetation.

First observations of a seasonal ozone hole appearing over the Antarctic occurred in the 1970s.

The alarm was raised in the 1980s after it was found to be worsening under the onslaught of CFC emissions – previously used in air conditioning and cooling units and in aerosol sprays – prompting 196 countries to join the Montreal Protocol.

Although CFCs have been phased out, they accumulated and persist in the atmosphere and the effect of the curbs will take years to filter through.

The ozone hole over the South Pole, which varies in size and is closely monitored when it appears in springtime each year, is likely to persist even longer and may even be aggravated by climate change, the report added.
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08-08-2011, 10:00 AM,
RE: The ozone layer is safe
The EPA just placed Ozone back on the hit list...

Quote:Super! EPA going after ozone now
posted at 10:05 am on August 2, 2011
by Jazz Shaw

In what has become a depressingly repeating pattern, if you take your eyes off of the EPA for too long they get up to all sorts of plans to “save” America. When they’re not fiddling around with vehicle mileage standards or cross-state emission regulation plans, they apparently spend their time taking a fresh look at ozone standards. They were originally set to issue some new guidelines on July 29 during the height of the debt debate, but the plan was temporarily tabled. Now, however, it’s back on the menu.

The U.S. economy won a temporary reprieve with the Environmental Protection Agency’s (EPA) announcement last week that new ozone standards, which had been slated for this summer, will be delayed. The EPA’s “reconsideration” of the ozone standards it set in 2008 and issuance of more stringent standards violate all three of the fundamental values EPA Administrator Lisa Jackson pledged to honor: “science-based policies and programs, adherence to the rule of law, and overwhelming transparency.”[1]

This enormously expensive regulation is unsupported by scientific evidence, violates the Clean Air Act (CAA), and appears timed to evade ongoing judicial review of the rulemaking process. Even the EPA’s estimate that the new rule will impose up to $90 billion in compliance costs annually[2] severely understates the impact on economic development and jobs in communities where attainment of the new standards will be impossible.

Back in 2008 the standard for ozone levels was set at an already challenging level of 75 ppb (parts per billion). Combined with other efforts, both regulatory and voluntary on the part of industry, air quality has been steadily improving from low points in the seventies. So why tinker with success, right?

Never ones to let a little think like that stop them, the EPA is now pushing to tighten the ozone standard to 60 ppb. (A proposal which has raised any number of eyebrows, since certain popular destinations fail to meet that standard today, including Yellowstone National Park.) But this will at least improve everyone’s health, right? According to a new study from NERA Economic Consulting (PDF), the health benefits are “greatly exaggerated” at best.

EPA’s assumed causal relationship between ozone and mortality has not been supported by EPA’s science advisors;

The health benefits EPA attributes to the tighter ozone standard should are due to a slight reduction in particulate matter (dust), which already is regulated separately by EPA; and

The EPA’s own data show that the benefits of the proposed ozone standard will not outweigh the costs.

But there must be some upside to this, right? We’re all supposed to focus on jobs now, as I recall. Hopefully this will at least help us out on that front!

Oh, it’s going to have an effect, alright. A study by Manufacturers Alliance/MAPI estimates that strengthening the ozone standard to 60 ppb could cost the U.S. economy more than $1 trillion per year between 2020 and 2030, and destroy 7.3 million jobs.

You may now return to your regularly scheduled banging of your heads against the wall.
There are no others, there is only us.
08-24-2011, 05:38 PM,
RE: The ozone layer is safe
What IS "the ozone layer"?
08-25-2011, 01:35 PM,
RE: The ozone layer is safe
are you asking because you dont know or because you want to an explaination from tad?

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