The concentration of the world's population in certain countries like China is primarily influenced by factors such as the country's large land mass and the impact of contraceptive use. Health conditions, including endemic diseases, do not greatly deter population growth. While emigration plays a role, it is not a primary factor in population concentration. ;
China's population concentration is mainly due to its large land mass and varying use of contraceptives. Healthcare improvements have also mitigated the effects of diseases. Emigration plays a minor role compared to these factors.
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