Ozone (O3) is a molecule made up of three oxygen atoms. In 1789, Martin von Murum discovered it and in 1840, Christian Friedrich Schönbein isolated it and gave it its original name, from the Greek ozein, which means to smell. Ozone is an important gas in the terrestrial universe despite its reduced quantity. It is a relatively unstable gas, becoming oxygen. It becomes liquid at minus one hundred eleven and nine tenths degrees Celsius and solid at minus one hundred ninety-two and a half degrees Celsius.

Ozone is naturally produced by wildfires and thunderbolts. Human activity produces it by ultraviolet solar radiation on certain polluting industrial materials. Electric motors, photocopiers and laser printers emit ozone, which can have detrimental consequences at significant concentrations in poorly ventilated rooms. Several processes make it possible to produce it industrially. Instead of chlorine, the industry can produce ozone on site and use it for disinfection without leaving a residue, other than natural oxygen. For example, it is very advantageous in the disinfection of drinking water, the city of Nice using it since 1907. Moreover, it is used in a multitude of industrial processes.

Ozone is toxic to the lungs, kidneys, brain and eyes, and its scent is easily perceived. It is harmful for living beings, attacking the respiratory system of animals and burning certain sensitive plants. It is also responsible for the corrosion of polymers. Its half-life is relatively short, a maximum of three months at minus fifty degrees Celsius, decreasing with increasing temperature and when mixed with water. In Europe, its concentration is limited to 60 parts per billion.

  1. A summary report for decision makers<
  2. The atmospheric ozone layer<
  3. The climate<
  4. The greenhouse effects
  5. The real climate change<
  6. Oil production and the earth's temperature
  7. Earth's temperature<
  8. From temperature to climate
  9. Professor Qing-Bin Lu<
  10. A conclusion on ozone<

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