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ENV222H1 Lecture : Jan24

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greydolphin518
15 Feb 2012
School
UTSG
Department
School of Environment
Course
ENV222H1
Professor
Geoffrey Mac Donald

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ENV222H1 Full Course Notes
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ENV222H1 Full Course Notes
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Document Summary

Lecture format: the phenomenon of population growth. Population growth or decline determined by ratio of birth to death rates. Populations in industrialized nations have stabilized or are falling; growth is occurring in. Death rates are influenced by scientific knowledge, technology and public policy in areas of sanitation, food supply, medicine and disease control. Birth rates are influenced by cultural attitudes toward having children and in particular to women"s control of their reproduction, which is tied to education and financial status. Need for increased food supply means increased conversion of land to agricultural use, with consequences for biodiversity, and fossil-fuel and fertilizer, pesticide use for agriculture (growing and transporting products), with consequences for climate change, nitrogen and chemicals. More people means more domestic live-stock and house-hold pets with associated environmental effects, eg disease transmission from poultry, cats killing birds; plus increased strain on the global food supply increased use of materials and energy::

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Related Questions

Population Growth When predicting population growth, demographers must consider birth and death rates as well as the net change caused by the difference between the rates of immigration and emigration. Let P be the population at time t and let N be the net increase per unit time resulting from the difference between immigration and emigration. So, the rate of growth of the population is given by

where N is constant. Solve this differential equation to find P as a function of time, when at time t = 0 the size of the population is P0.

A major factor influencing growth in the health care sector of the US economy is:

a) The aging of the population

b) Increasing fertility rates

c) Declining death rates

d) All of the above

ENVIRONMENTAL INTERACTIONS; Many people regard the rapid population growth of less industrialized countries as our most serious environmental problem. Others think that the population growth in industrialized countries, though smaller, is actually a greater environmental threat. What problems result from (a) population growth in less industrialized countries and (b) In industrialized nations? Which do you think is the greater threat? Why?