The most important use of oxygen is in respiration. Oxygen is of great importance in the chemical and the iron and steel industries.Its other major use is in steel production â¦ , for example in the Bessemer process. The oxyacetylene torch is another important industrial application.ts other major use is in steel production, for example in the Bessemer process. The oxyacetylene torch is another important industrial application. Oxygen is utilized in medicine in the treatment of respiratory diseases and is mixed with other gases for respiration in submarines, high-flying aircraft, and spacecraft.
Ireland is known as the Emerald Isle. Green is traditionally worn on St. Patrick's day to honor the Emerald Isle. Tradition holds that on that day, people who do not wear green are pinched as a reminder to wear green to honor the Emerald Isle.
3. Green may be the national color of Ireland, but the color most associated with St. Patrick is blue. The Order of St. Patrick was established in 1783 as the senior order of chivalry in the Kingdom of Ireland. The color associated with the honor needed to differentiate it from the Order of the Garter (dark blue) and the Order of the Thistle (green). So they went with a lovely shade of sky blue.