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Until about two million years ago Africa’s vegetation had always been controlled by the interacti...

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economic gains.  lost productivity.  chronic diseases.  infectious and parasitic diseases.  
36 million  22 million  More than 32 million  More than 21 million  
two hundred and fifty million  one hundred million  about half of the total population in the world  seven thousand million  
two million  two million of  two millions of  two millions  
300,000  two million  400,000  480 times 300,000  
is; live  is; lives  are; lives  are; live  
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million    millions    million of    millions of  
two million    two millions    two million of    two millions of  
More than 17 million.  More than 380 million.  More than 304 million.  More than 25 million.  
two million; millions of    two millions; million of    two millions; millions    two million; million of  
two hundred and fifty million  one hundred million  about half of the total population in the world  seven thousand million  
two millions    two million    two millions of    two million of  
two million    two million of    two millions    two millions of  
How    What    How many    How much  
million of    millions of    two million of    two millions  
millions of, two fifths    million of, two fifth    eight millions, two fifths    eight million, two fifth  
two million  two millions  two million of  two millions of  

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