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Env. chap.9
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Question | Answer |
---|---|
professionals who study and make predictions about human populations are called? | demographers |
which factor contributed most to the expotential grownth of the human population | more food, better hygiene |
educating women worldwide has lowered birthrates partly because? | because they don't have to bear with children |
the 1991 cholera outbreak in Lima, Peru was caused by? | unmanaged water sources |
an increase in waterborne diseases could possibly be alleviated by? | by boiling water |
between 1880 and 1930 human population dopubled due to? | because migration increased |
which disease is often spread through unsafe public water sources? | water borne parasites or other diseases |
what is a reason that wood is considered a limitted resource in many developing countries? | trees are sometimes cut down for fuelwood when there are no dead trees already |
scientist predict population sizes by using age structure, suvivorship, fertility rate, and what other thing? | migration |