SCI 1102 Lecture 2: Lecture 3: ch8 Human Population
Document Summary
Is population growth a problem: varying theories, humans will use up all of earth"s resources (food, water, land, etc, we need young people to care for the old, need laborers, thomas malthus" an essay on the principles of population (1798, war, disease, starvation reduce population, neo malthusians: population growth will increase faster than food production , paul ehrlich"s population bomb cause famine and conflict the end of the 20th century. D. (1968) predicted that civilization would end by: cornucopians: we will continue to find new resources & technology to support people, environmental scientists argue there are finite resources, land is limited, extinct species are gone forever, quality of life will suffer with unchecked growth, less food, space, wealth per person. Things demographers study: population size, density and distribution, age structure, sex ratio, birth, death, immigration, and emigration rates, population size, current world population is just over 7 billion, estimated to grow to over 9 billion by 2015.
