GEOG 1HA3 Lecture Notes - Lecture 10: Agricultural Productivity, Thomas Robert Malthus, Population Pyramid
16 Jan 2017
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Document Summary
Globally, population is understood with two things: fertility (births) and mortality (deaths) Regionally though, population is also influenced by population movement: migration (immigration and emigration) Cbr=(b/p)*1000: total number of live births per every thousand people. The number of women in the population, and the number of women of child bearing age (15-49) Total fertility rate: the average number of children that a woman will have in her fecund years. Total number of deaths per year for every 1000 people. Range: less than 10 to more than 150. The average number of years of life. Range: from the low 40s to more than 80. Low fertility and low mortality means some areas are in decline. Rapid population growth ~6 billion in 200 years. Stated that population grows geometrically, but resources grow arithmetically. Malthus assumed the world was at stage 2. Positive checks: people will go to war. He did not consider: agricultural productivity, contraception and reduced fertility rates.
