POPULATION GEOGRAPHY Introduction What is Population Geography? A division of human geography concerned with spatial variations in distribution, composition, growth, and movements of population. We currently have… 7 BILLION PEOPLE on the planet. :-O http://www.worldometers.info/world-population/ Ecumene Portion of the world’s land surface that is permanently settled by human beings. 75% of people live on only 5% of the earth’s surface. About 50% of people on the earth live in cities. Demography The study of the patterns and rates of population change, including birth and death rates, migration trends, and evolving populations distributions. Demographics= statistical characteristics of a population Gender, age, race, disabilities, mobility, home ownership, employment status, location, etc. Population Geography= GEODEMOGRAPHY Linear Versus Exponential Growth How is our population growing? Doubling Time Time period required for a population experiencing exponential growth to double in size completely. At a 3% growth rate, the time it will take for a population to double is less than 25 years. Growth rates currently exceed 3% in parts of subSaharan and tropical Africa, the Middle East, and Central America. Where is the population growing? Carrying capacity Maximum number of people a region can reasonably sustain. Overpopulation Occurs when a region exceeds its carrying capacity. This is difficult to measure because of changing technology and environmental issues that continually alter the carrying capacity. Overcrowded Simply too many people but the carrying capacity has not been reached. Underpopulation Measure that is difficult to pinpoint; occurs when a population size is below its carrying capacity and cannot sustain the economic development it has reached. Trouble society. filling jobs and fulfilling responsibilities to Zero Population Growth Proposal to end population growth through a variety of official and nongovernmental family planning programs. Many activists in the more-developed countries believe overpopulation is the root cause of the world’s social and environmental problems.