The amount of the most important natural resource is on the decrease

The author gives a warning overview of the most important resource in the world is oxygen. The problems of carbon dioxide and methane as threats to life on Earth, are often discussed in media. Most of the problems related to the greenhouse gases are closely related to the consumption of oxygen. Oxygen is often considered as a renewable resource. However, this view is clearly wrong. With the help of many diagrams and tables, the author reveals that the resources of oxygen are limited. The article looks at the origin of oxygen and the changes in the natural production of oxygen through geological history of Earth. The main user of oxygen is mankind, the energy sector being most responsible for the overuse of oxygen