The 2009 World Population Data Sheet highlights that global population growth is predominantly occurring in poorer countries, particularly in Africa and Asia, where the youth population is concentrated. It underscores stark demographic contrasts between developed and developing nations, especially in youth and elderly populations, fertility rates, and educational attainment. The document emphasizes the challenges faced by young women in countries like Zambia and Mali, including limited educational opportunities and high rates of early marriage and childbearing.