Do you want to know about push and pull factors well you have come to the right place. Frust push factors a push factor is a factor that encourages migration.the frust Factor
Is lack of jobs casing more unemployment. Second factor is lack of resources like food or water because we need food and water. Last but not least is civil war, civil war can tear apart families so some will move to avoid the war.
So what about pull factors, well pull factors are factors that make people what to move to a new country. One factor is excise of jobs. The next factor is mild weather some what colder/warmer weather.The last factor is resources like food and water.
Countries have different cultures this is world culture. So what about the population of the countries well population growth is how fast the population grows the population growth of the world is 83 million people born per year and the population will be over 10 billion by 2100.