Which of the following was the most significant limiting factor in human population growth in the 20th century?
A) clean water
B)non-HIV disease
C)HIV
D)genocide
E)famine
Answer: A
Which of the following was the most significant limiting factor in human population growth in the 20th century?
A) clean water
B)non-HIV disease
C)HIV
D)genocide
E)famine
Answer: A