It is the 2nd most abundant gas inside the environment. About 21% of air is oxygen. On the other hand, oxygen is quite reactive. It very easily brings together with other features. It is replenished by plants and various photosynthetic organisms. Combustion reactions are a major supply of Electricity for https://archerowelr.bloggactivo.com/35992262/5-essential-elements-for-hyperbaric-oxygen-therapy-chamber-cost