Population growth


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Population growth

  1. 1. Population Growth
  2. 2. Population refers to a group of organisms of the same kind or specie living in the same place at the same time. A population may increase or decrease due to birth, death, immigration and migration.
  3. 3. Population Growth • It is the change in a population over time, and can be quantified as the change in the number of individuals of any species in a population using "per unit time" for measurement. • In demographics, population growth rate (PGR) is the rate at which the number of individuals in a population increases in a given time period as a fraction of the initial population.
  4. 4. Just a by looking at the picture, we can say that the Philippines has big population. This big population is brought about by the rapid population growth in the country.
  5. 5. Countries with the Largest Population A United Nations report in 2009 revealed that the Philippines ranks 7th among Asian Countries with big population. At present, the Philippines ranks 12th among the most populous countries in the world.
  6. 6. Factors that Affect the Population Growth
  7. 7. 1. The birth rate exceeds the death rate. The population naturally increases if the number of births is greater than the number of births at any given of time or if the death rate is slower than the birth rate.
  8. 8. • Birth Rate or Fertility Rate It refers to the number of births per 1000 people per year. Formula: B.R.= Number of births within a year Total population within a year B.R. = 1,766,440 76,504,077 X 1000 X 1000 =23.09
  9. 9. Death Rate or Mortality Rate • It refers to the number of people who died per 1,000 people in a given year. D.R.= Number of deaths within a year Total population within a year D.R.= 366,931 76,504,077 = X 1000 X 1000 =4.80 In the Philippines, the death rate continues to decline due to improved health and sanitation, health care and improved standard of living.
  10. 10. 2. The development in Science and Technology has made the life expectancy of Filipinos longer. • With the help of the Department Science and Technology (DOST), the agency tasked by the government to develop pharmaceutical products for priority health problems,better health and long life are attained.
  11. 11. 3. Some beliefs and practices of the Filipinos also influence the population growth. • Filipinos believed that children are blessings to the family and that more children mean more blessings. I the rural areas where the main livelihood is agriculture, to have children means more hands to help in tilling the field, harvesting, and engaging in other means of livelihood.
  12. 12. Problems on Population Growth 1. Food Shortage If there are more people, more food supply is needed. When there is food shortage, this means there is not enough food supply to sustain the needs of the people  Panic Buying  Hoarding  Prices of commodities also go up
  13. 13. 2. Water Shortage For more people, naturally more water is needed. In a place where the population is big, there is water problem. 3. Housing Problem There are only a few families who own their houses and lots. At times, in crowded areas, people build their houses along the railroads, riverbanks and even along sidewalks. These people are called informal settlers.
  14. 14. 4. Unemployment • Too many people compete with one another for the limited jobs that are available. Unfortunately, the government cannot provide enough jobs for every job applicant. Many applicants end up underemployed-working in jobs way below their educational qualifications and attainment.
  15. 15. 5. Peace and Order • Due to big population, unemployment, hunger, homelessness, sickness and frustrations, many people resort to illegal and criminal acts just to survive. This leads to a rise in criminality that endangers the peace and security of the country.
  16. 16. 6. Health Problems 1. Malnutrition due to lack of food and food nutrients 2. Unsanitary surroundings due to indiscriminate garbage disposal 3. Poor hygiene and poor health 4. Presence of diseases like bronchitis among babies, diarrhea and tuberculosis
  17. 17. 7. Garbage Problem When there are many people producing garbage, we need more space for garbage. Rotting garbage gives off poisonous gas called methane. This adds to air pollution. Heaps of garbage that easily decay are biodegradable and those that do not are non-biodegradable like pieces of plastics or plastic bags. Plastic materials clogging in “ esteros” and canals contribute to flooding.
  18. 18. 8. Pollution In crowded communities, many people are prone to polluted air, contaminated water and noisy environment. As the population grows, more industries and factories are built. These give off harmful gases and chemicals like nitrogen oxide, carbon monoxide, and lead. Water is also polluted in crowded communities.
  19. 19. 9. Education- To help the citizens of our country, the government provides free elementary and secondary eduation to everyone.
  20. 20. Solutions to Problems on Population Growth  Development programs to increase food production,provide potable water supply, construct more road and bridges.  Promoting health and wellness of the people by building more hospitals, health clinics and render effective health services.  The government has carried out housing programs on low cost housing in cooperation with the National Housing Authority.  To protect our environment,the government has initiated environment protection projects like Pasig Rehabilitation Program and Haribon Foundation Program. Congress has passed laws on environmental care and protection such as Philippine Clean Water Act and Clean Air Act.