Definition of Brain Drain. Brain drain can be described as the process in which a country loses its most educated and talented workers to other countries through migration. This trend is considered a problem, because the most highly skilled and competent individuals leave the country, and contribute their expertise to the economy of other countries.
Olives, like many other kinds of produce such as potatoes and sour cherries, just aren't something that you eat raw. Unprocessed, straight off the tree, they are bitter, very bitter, and the green ones even more so than ones which have fully ripened to black.
Types of Olives and Olive Oil. Olives come in two main colors: green and black. The color of an olive is actually determined by its degree of ripeness. Green olives are unripe and black olives are fully ripe. There are also colors in between, including red and purple, which are color changes the olives go through on their trip from unripe to ripe.