The current world population has increased a lot, by changes in world population. Due to the rate of birth and death, which affect as well. In every country around the world with the United Nations (UNFPA) has recognized the importance of population or human, which is the main factor that caused the climate change. The world has been celebrating the world population has reached 5000 million on July 11 2530 (1987) The United Nations declared the Saturday 11 July world population day every year. World population, it is likely that there will be less childhood. By the number of older population is likely to be higher. Indicates that the population structure has changed into community elderly (Anging Society), which is now Europe has become the region with the most elderly people in the world, especially in Italy, Germany, Greece, Switzerland, many many countries. Trying to study and research about the elderly more. To improve the quality of their country becoming "elderly society of quality," he said. Further in the future. Asians have a number as high as 60% of the world population. That China is a country with the largest population in the world and the country, followed by India. Best Thai country it is rated at 19, with a population of 60 million people (2539 (1996)), which forecasts that in 2562 (2019) Thai people will have the same number of 70. Millions of people.The main factor that makes the population more and more. Caused by-Medical research that has developed more effectively, such as vaccine production, prevention and treatment of diseases, as well as with the organization about the outbreak, and the cycle of germ.-Knowledge about the health of the population of the world population, almost every country has a greater knowledge of healthcare issues including managing system. Effective family planning.-The progress of technology that people can get to know the medical news and health to such a patient can discuss symptoms with doctors over the phone or the media or medical consultation through telecommunications systems, etc.-Social system changed. Women have a greater social role. Make one woman with attitude toward marriage is a negative. As a result, the number of less childhood population.
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