Largest number of individuals of a population that a environment can support.
Population explosion
A sudden, large increase in size of a population.
Demographers
People who study humanpopulations
Demographic momentum
The number of people added each year remains very high. This is because there are so many women in the child-bearing age range.
Demographic
Relating to the structure of populations (mortality rates, which influences fertility rates)
Social/cultural
Common traditions, habits, patterns, and beliefs that present in a population group.
Remittance (Economics)
The funds migrants send to their relatives.
Political
Governments can influence fertility rates, such as pronatal.
Pronatal
Policies which are designed with the purpose of increasing the birth rate/fertility rate of an area.
Overpopulation
When a country/region does not have enough resources to keep its people at a reasonable standard of living.
Underpopulation
When a country or region has more resources available than are being used by the people living there.
Optimum population
A concept where the human population is able to balance maintaining a maximum population size with optimal standards.
Natural population change
the difference in number between those who are born and those who die in a year.Additional effects of migration are not included.
birth rate - death rate
Overall population change
The change in the size of a population due to birth rates, death rates and net migration rates.
birth rate - death rate ± net migration
Birth rate
The number of births per 1,000 of the population per year.
Death rate
The number of deaths per 1,000 of the population per year.
Dependancy ratio
A relationship between the number of people of working age (15-64) and the young dependency (0-14) and the old dependents (65+) who depend on them for benefits, pensions.
Net migration
The difference between the number of immigrants and the number of emigrants per 1,000 years.
High youth dependency
Large numbers of 0-14 years compared to those of working age (15-64).
Old-age dependency ratio
The ratio of the number of elderly people (+64 years) to those of working age (15-64 years).
Mega city
Large city with a population of over 10 million people.
Forced migration
Refers to the movements of refugees and IDPs as well as people displaced by natural or environmental disasters, famine, or development projects.
Voluntary migration
Migration based on one's free will and initiative.
Internal Migrants
A person who moves to live/work in a different place within the same country.
Migration
The movement of people from one place to another.
Emigrant
People who permanently leave one country to live in another.
Pull factors
These are features of their new destination that makes them want to move there.
Immigrants
Migrants that move into a country.
Internal displaced people (IDP)
People who are forced to leave their homes but who are not refugees because they stay within their country's borders.
Transmigration
The relocation of a large number of people as a result of a government plan.
Push factors
These are features of their home area that make them want to move away.
Rural to urban migration
Movement of people from the countryside to the city.
Refugee
A person who leaves their country of origin in fear of their lives.
Intervening obstacles.
Factors that cause migrants challenges or prevent them from reaching their goal.
Counter-urbanisation
Movement of people from the city to rural environments.
Economic migrant
A person who moved to live and work in a different country for at least a year.