Here's some more facts for you warriors: At the height of man's CFC production the total per year was 1.2 million tons. Less than 500 million tons were produced over the years of production 1930-2000. The Oceans of the world produce 600 million tons of Clorine per year, this is not even equal to man's total CFC production.
Here's a challenge for you diggers:
Back in 1994 there was a bill in the House to investigate this fraud(HR-291, IIRC). I can't find a trace of it.
Most of the Freon demonizers claim that the lighter than air superheated gases (reactive halides) spewing out of volcanos combine with water vapor and fall back to the ground within 7 days, yet that Freon(an inert halocarbon) which is 6 times heavier than air at sea level, floats magically to the Stratosphere over the Southpole(against 200MPH+ winds) where it decomposes into HF and HCL and reacts with Ozone. The claim is that one atom of Clorine can destroy upto 10,000 Ozone molecules, but this too has never been proven.
Also, coincidentally(of course) to the ban, Dupont's international patent on Freon expired at the same time the ban went into effect.
If volcanos released CFC's the only ozone hole over the Southpole would be due to the lack of sunlight during the winter.
In the 1980s, emissions of CFCs added chlorine at the rate of 1 Mton per year to the atmosphere. This resulted in an increase of 0.3 Mton per year in the stratosphere. High-end estimates of the amount of chlorine spewed into the atmosphere by a major volcanic eruption ranged from 0.1 to 1 Mton. Eruptions such as El Chicon in 1982 and Pinatubo in 1991 were sufficiently powerful for their plume to reach 25 km, well into the ozone layer. However, the amount of chlorine added to the stratosphere by El Chicon was only 0.04 Mton, and the amount added by Pinatubo was even less. These amounts were much lower than the high-end estimates because the volcanic plume contains 1000 times as much water vapor as it does HCl. The HCl readily dissolves in water and rains out within a few days.Mt. Erebus, an antarctic volcano, was identified by some early researchers as playing a role in creating the ozone hole. During its most active period, the late 1970s and early 1980s, it contributed about 0.06 Mton of chlorine per year to the atmosphere. In 1991, this figure was only 0.013 Mton. The plume of Mt. Erebus reaches about 0.5 km above the volcano, which is at a height of 3794 m. Even though the tropopause is very low and weak (if it exists at all during the antarctic winter) it is unlikely that much of the chlorine from the plume reaches the stratosphere.
The general conclusion is that volcanically-produced sulfate aerosols have a destructive effect on ozone, but that volcanically-produced chlorine is of minor importance.
Wheeling Jesuit University