The difference between the fertility rate and the death rate corresponds with the birth rate. When you take the number of children that have been born (alive) in a given year, and then minus the number of the people that have died in the same year, you get the birthrate. It can be positive, when there's more born children than people that died, or negative, when there's more people that died than born children.
Answer:
Brain drain is one of the earliest phenomena associated with globalisation, which has significant adverse effects at the local level.
The departure of skilled workers can weaken developing countries, especially smaller ones, by depriving them of important skills and workforce.
It is certainly the most efficient system of reproduction.
It doesn't require dating, dinner, movies, courtship, etc.,
and it doesn't even require locating another compatible,
cooperative individual, or even knowing anybody else.
It eliminates all of the preliminaries, and cuts straight to the chase.
Even headaches are irrelevant.
