Before revision: Population trends The change in total population over a period is equal to the number of births, minus the number of deaths, plus or minus the net amount of migration in a population.
After revision: <ref>Cite URL megatrends: The ever-changing landscape of population is everywhere and population changes because of birth rates death rates and migration.Heyyy peoplePopulation trends The change in total population over a period is equal to the number of births, minus the number of deaths, plus or minus the net amount of migration in a population.