Ozone jump on it - Ozone - Wikipedia

    Ozone is a powerful oxidant (far more so than dioxygen) and has many industrial and consumer applications related to oxidation. This same high oxidising potential, however, causes ozone to damage mucous and respiratory tissues in animals, and also tissues in plants, above concentrations of about 6993100000000000000♠ 100 ppb . This makes ozone a potent respiratory hazard and pollutant near ground level. However, the ozone layer (a portion of the stratosphere with a higher concentration of ozone, from two to eight ppm) is beneficial, preventing damaging ultraviolet light from reaching the Earth 's surface, to the benefit of both plants and animals.

    The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson . Its properties were explored in detail by the British meteorologist G. M. B. Dobson , who developed a simple spectrophotometer , the Dobsonmeter . This tool could be used to measure the ozone levels found in the stratosphere from the ground. Between 1928 and 1958 Dobson established a worldwide network of ozone monitoring stations. Most of these stations are still in use today. The " Dobson unit ", a convenient measure of the total amount of ozone in a column overhead, is named in his honor.

    Ozone depletion and the ozone hole generated worldwide concern over increased cancer risks and other negative effects. The ozone layer prevents most harmful UVB wavelengths of ultraviolet light (UV light) from passing through the Earth's atmosphere . These wavelengths cause skin cancer , sunburn , and cataracts , which were projected to increase dramatically as a result of thinning ozone, as well as harming plants and animals. These concerns led to the adoption of the Montreal Protocol in 1987, which bans the production of CFCs, halons, and other ozone-depleting chemicals.

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