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The name is typical political doublespeak. Same ozone, just two different areas containing it. Ozone is required above the lower troposphere (the ozone layer is in the lower stratosphere) to absorb UV-B from the Sun to protect all surface life. When ozone is formed in the troposphere (where we and our food supply live), its oxidative properties are such that it hurts / kills all life that comes in contact with it.

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16y ago

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