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.
A full size Douglas fur tree will produce about 260 pounds of oxygen in a year.An oak tree will produce simmilar ammounts, as will most other large trees. Smaller bushes may produce around 20-40 pounds as will grass lawns. full size Douglas fur tree will produce about 260 pounds of oxygen in a year.