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.
Trees help settle out and trap dust, pollen and smoke from the air. The dust level in the air can be as much as 75 percent lower on the sheltered side of the tree compared to the windward side. Trees create an ecosystem to provide habitat and food for birds and other animals. Trees absorb carbon dioxide and potentially harmful gasses, such as sulfur dioxide, carbon monoxide, from the air and release oxygen. One large tree can supply a day's supply of oxygen for four people.