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OZONE HOLE

Hole in the ozone layer, which allows ultraviolet rays into the earth

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OZONE LAYER

That region of the stratosphere, between about 20 and 40km above the Earth

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OZONIDES

Explosive organic compounds formed by the addition of an ozone molecule to a double bond,

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OZONIZER

An apparatus in which oxygen is converted into ozone by being subjected to an electric brush discharge. Ozone was formerly thought to be beneficial in air- conditioning, but is now known to be toxic

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