SCI 1102 Lecture Notes - Lecture 2: Anne H. Ehrlich, John Holdren, The Population Bomb
Document Summary
Human population grows by 70 million every year (2 people per second} Increase in a quantity by a fixed percentage per unit of time. Human population growth rate: currently at 1. 2: doubling time. The number of years it takes a population to double its size. Estimated by dividing 70 by the annual percentage of growth rate. For example, if annual world population growth rate is 1. 2% then its doubling time is 70/1. 2% which is equal to 58 years: theories on population growth. Thomas malthus (1766-1834): an essay on the principle of population. Paul and anne ehrlich: the population bomb. Population growth affects the environment: ipat model. Proposed in 1974 by paul ehrlich and john holdren. New technologies, more agricultural production, better medical care, better sanitation. Historic need for farm labor, restrictions on women"s rights, prohibitions on birth control. The study of human populations, applying the principles of population ecology.
