A. World Population Growth:  is it a threat to Earth's dwindling resources and Human extinction?
        see text figs >  [human population* [ growth models: exponential* &  sigmoidal*  -  examples* ]
               Unlimited population growth (exponential growth) assumes unlimited resources (?)
               population dynamics depends upon births, deaths, immigration, & emigration...    fig 53.3*
               carrying capacity is max population size a particular environment can support...   animation^view@home 

What is a likely carrying capacity for Earth?    &    how might it be regulated?...
US Census Bureau   UN projections    &    Select country projections*    -->    Annual global growth rate*            What may be the causes for the human population growth rate decline leading to stability ???        Replacement Level Fertility -  Global fertility (2020)*  &  Projections vs. RLF*  &  Declining rate-Top 20*       a definition...*             -   U.S. Fertility 1900-2022* &  Fertility & Contraception (2020)* &  predictors*
Population Pyramids -       a definition...*	Age structure pyramid*   &   Nigeria & Japan comparions*   Comparisons*                 &   US 1980-2020   Indiv. country pyramids* &   population pyramid --> Homework*
Can you think of some strategies to help control Human population growth?
Some unique population facts*        and          If the World were 100 People    World's Largest City Populations   U.S. Population Clock site     U.N. Population Database                                                                     Visualization of the World's 8 Billion Humans
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