Overpopulation

人口過剩 /人口过剩

rénkǒu guòshèng

(excessive number of occupants in a particular area; specifically, when the number of occupants exceeds the ability of that area to provide for them)

人口過多 /人口过多

rénkǒu guòduō

(excessive number of occupants in a particular area; specifically, when the number of occupants exceeds the ability of that area to provide for them)