The definition of a concubine is a woman who is a mistress to a man with a wife or who cannot be married to her because of a difference in social status. An example of a concubine is one of the mistresses of an important king who has many wives and mistresses. concubine. concubine.
How do you identify a tree species? It is known that mature, leafy trees, such as redwoods, aspens and oaks, are the best producers of oxygen. Additionally, it is known that a tree produces higher volumes when growing than when mature, because converting air and soil into wood causes the tree to produce more oxygen.
Oxygen is a byproduct of photosynthesis and, correspondingly, carbon dioxide the byproduct of respiration. Trees are often credited as the major oxygen generator for the planet, but that would be false. Most of the planet is covered with water and the collective photosynthesis of lowly algae is the true oxygen machine.