We are offering oxygen, argon, nitrogen. 1.oxygen, a colorless, odorless and tasteless gas, reduces the aging process of human cells. All life on earth needs oxygen for survival. In fact, humans breathe oxygen in and out 16 times per minute on average. It is reproduced by plants during photosynthesis. In turn, humans breathe out carbon dioxide, something the plants need for survival and also used for welding and cutting 2. Argon is used for cutting for machinery 3. Nitrogen is used for cutting and welding