AHSS*1030 Lecture Notes - Lecture 6: Thomas Robert Malthus, Doubling Time, Demographic Transition
Document Summary
Environmental issues: population, affluence and technology (i. e. i = p x a x t) Demography: study of the size, composition and distribution of human populations causes and consequences of changes in these characteristics. Population change: (birth + immigration death + emigration)/1000 ppl x 100 processes: births, death and migration. Crude birth rate: number of births per 1000 ppl in pop (crude death is the same) World pop increasing at a slower rate. Africa has the greatest pop increase and death rate. Doubling time: time takes for a population to double in size. Rule of 70= 70/% growth rate =doubling time in years. Thomas malthus: studied growing pop with concern, from principle of pop. Predication of doomsday did not come true bc he couldn"t have foreseen the demographic transition. The range of growth rates is -1. 7 to 1. 1. Syria has lowest growth rate, lebanon highest , africa has the highest in general.