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 emitted as trees ad mass (wood or leaves) and create sugar for cell food. No tree has been identified as being more efficient than any other for this activity. The amount of oxygen generated by tree is dependant on the speed of its growth and the length of the growing season. As a consequence the youngest trees (saplings) are adding woody mass quickly and are producing oxygen at a high rate.