The colorless, odorless, and tasteless gas (Oxygenium, from oxys = sharp, sour) makes up 21% of the Earth's atmosphere, along with Nitrogen (78%) and Carbon Dioxide (0.04%). The name is actually incorrect because oxygen (rather than hydrogen) was previously thought to be responsible for the formation of Acids. Oxygen is the main component of Water and is also found in numerous compounds in the Earth's crust. With about 50%, it is the most abundant element on Earth. It is released during the Photosynthesis of plants, which involves sunlight, water, and carbon dioxide. Most aerobic organisms (humans, animals, plants, Fungi, many Bacteria) require oxygen to live. However, in high concentrations, it is toxic substances to most living beings. Oxygen is extremely reactive and quickly forms compounds with most substances.
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Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi