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what environmental factors change as you go deeper in the lakes
historically, up until the middle ages, populations were mostly limited by what?
disease, famine, and war
The population theory held by Thomas Malthus was the human population would what?
overshoot its carrying capacity, then suffer starvation and misery
what did malthus say was the ultimate cause of social and environmental problems?
excess population growth
What did marx say about population growth?
he said that it results from social and environmental problems
what is the difference between total growth rate and natural increase?
total growth rates include immigration and emigration as well as births and deaths
the demographic transition refers to a country's change from
high birth and death rates to low birth and death rates
the harvard food pyramid emphasizes that you should sparingly consume these following foods
condition of being overweight
-no longer restricted to the wealthy nations of the world
-is spreading along with western diets and lifestyles
-substantially increases the risks for a number of diseases
-results from lifestyles that involve less walking, less physical work, and more leisure
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