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Originally Posted by ArmchairGeneral
My last post started me thinking. We've got this wonderful ozone layer that blocks all of the most harmful UV and most of the rest. But before the development of photosynthesis, there was virtually no oxygen present, correct? So, no oxygen, no ozone. No ozone, and UV-B and C come through in full strength. So how did organisms survive this radiation onslaught? Especially the ones that started up photosynthesis. They would have to be right out in the sunlight, so they would need some pretty potent defenses, I would think.
(edit) Just noticed, this is my 999th post. Cool.
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Simple, plants and life developed in the water first. Water blocks UV radiation.
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That's all I'm trying to say. Everything in nature goes in cycles. The hole in the ozone layer will reduce in size eventually. When that happens, no amount of CFC in the air can stop it.
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If you have a certain amount of FCKW in the ozonelayers you will simply shift the chemical balance to a lesser amount of ozone present in atmosphere.
To give you an example of everydays life. Take a hot bath with bubbles. While you bath you will see that the bubbles disappear . What happens is that your small amounts of fat from your skin are responsible at first destroying the bubbles and later on preventing the creation of new bubbles. Even if you drain the tube and refill it it with hot water you wont be able to create as much bubbles as before. You have to clean the tube before you can take again a good bubble bath.
In some way its same in the atmosphere.
Problem with certain chemicals is that they act like a catalysator.