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.
In the 17th century, it wasnât the color green that was associated with St. Patrickâs Day, but the color blue. The color changed to green for a number of reasons. Green is one of the colors in Irelandâs flag, and and Ireland is often referred to as the âEmerald Isle,â named for its lush green landscape. Green is also the color of the shamrock, which is associated greatly with the holiday. If you donât wear green on St. Pattyâs, you better watch out. Back in the 1700âs people who forgot to wear green started to get pinched by their peers. Why? Because legend has it that if you wear green on that day, you are invisible to the leprechauns and fairies. If you forgot to wear green, they could see you and would pinch you because you were the only thing visible.