What Is Ozone? Ozone is a form of Oxygen. Like oxygen, ozone is also a gas. It is that fresh clean smell that you find at high altitudes and after thunderstorms. Ozone is therefore named after the Greek word Ozein, to smell. Ozone is present all around us in the air that we breathe. It protects us from harmful sunlight.

Because Ozone is also a powerful oxidising agent, it has been used widely for the past 40 years to purify water systems and the water you drink.

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