annieca
Answered

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what condition could change the density of any of the population?

Sagot :

There is no condition that could match the global outbreak, natural or man-made disaster, and a deliberate and strict implementation of birth control.  The latter will reduce the density later on. 

 

The global pandemic is one of the fearsome condition that existed in the history of man.  This is proven such as during the time of black death, the worst pestilence in European history up to that time, killing around 25 million people in just three years!

 

Another possible condition is the natural or man-made disaster like wars and famine.  In our time, we feared the nuclear war which could endanger any living species here on earth.

 

Lastly is the strict implementation of birth control.  If this is implemented properly, then the population density would have to drop largely fifty years from now according to some estimates.