This growth is primarily due to advancements in healthcare, sanitation, and food production, which have led to a decrease in mortality rates and an increase in life expectancy. Another factor contributing to overpopulation is the lack of access to family planning services in many parts of the world. In developing countries, where the population growth rate is the highest, many women do not have access to contraception or education about family planning methods. This leads to larger family sizes and higher birth rates, exacerbating the issue of overpopulation. Overpopulation has a number of negative effects on society and the environment.