Currently, world population has increased a lot. The transformation of the world's population The incidence and mortality. As a result, the In every country around the world With UN (UNFPA) has recognized the importance of the human population. The main parameters The resulting changes in the conditions. The world has celebrated. Global population amounted to 5,000 million on 11 July 2530 the United Nations. Declared on 11 July of each year. The World Population Day , the global population is likely to have fewer children. The number of aging population is likely to rise. Show that the structure of the population has changed into an aging society (Anging Society), which now become the European region. The elderly in the world. Especially Italy, Greece, Germany, Switzerland Several countries So try to study and research on the more elderly. To develop their country has become. "Social seniors with quality" for the future of Asia with a total of up to 60% of the world population. Which China As a country with the largest population in the world. Followed by India The country was ranked 19th, with a population of 60 million people (2539), which anticipated that in the year 2562 there will be 70 of Million people in Thailand. people are major factors contributing to the increasing population. Due - medical research. With the development of more effective vaccines to prevent and treat such diseases. Including the Organization on the outbreak and the cycle of transmission of the disease - knowledge of the health of the population. Virtually all of the world's population has more knowledge about hygiene as well as handling systems. Effective family planning - the advancement of technology. The public can now inform medical. Health and thoroughly as patient symptoms, consult a doctor. By phone or media Medical or counseling. Through various telecom Etc. - social change. Women began to have a greater role in society. Women who have a negative attitude towards marriage. The youth population is reduced.