The document discusses global population trends and dynamics over time. It notes that population is unevenly distributed, with some countries having high population densities while others have low densities. Population levels are influenced by physical, historical, economic and other factors. The world population growth rate has declined overall in recent decades, though some regions still experience high birth rates. Migration patterns also impact population changes as people move between areas.

1. The people in the planet

5. Decrease of the birh rate. In Eorupe and other countries, the mortality was decreasing, because there was medicines, vaccine and the figh agains the mortality of the childrens. The birth rate was decreasing for three causes: * The new condition of the life that impose an agrarian society to an urban society. * The desire to have a very good life and the high consumption * Protect the childrends, and like that they won´t have illness, and have and education for them, that sometimes can be expensive. Evolution of population in the poor countries. Demographic stability: Until the XX century. It had a very high mortality and birth rate Mortality decrease: The rich countries help them for have more medicines and for don´t have diseases.

7. The population in rich countries The general characteristic of the population dynamic is his process of aging. The decrease of the birth rate because the fertility decrease. The reasons are a lot, but some of them are: it´s difficult to have an stable job, the wish to have a good life, difficult things for live in a block of flats… A high life hope: They had better aliments, good doctors and with them, we had too many old people, and the people lived more. The population in poor countries Althought the fertility rate appears decrease slowly, the general characteristic is the high birth rate. * The population is young and there are lot of people with the age for have childrens * The increasing population need more food, hospitals, schools, jobs and places to live. * In the countries that there aren´t old-age pensions or health services, and where the school isn´t obligatory, the chlidrens always have represented a wealth for the families.

12. The productive sectors and the differences between countries The active population for productive sectors let us to know the degree of economic development of a country: In the rich countries, the percentage of active population in the primary sector is very low. In the industrial countries it´s usual to decrease the active population that it´s worked at the secondary sector, and in the developed countries, the tertiary sector grows. In the poor countries the half of the actual population is work at the primary sector. The problem of the unemployment The principal reasons of the developed´s dispossession countries are: the mechanization, informatives of many tasks, close the companies. In the poor countries, the problem of the unemployment and the work is very usually. There, the active population is working at the agriculture, but the population grows very quikly and there aren´t lands for all. When they are like that, the population emigrates. In the poor countries there are very few working places.

13. Daniel Cruz Cordero 2*A