Overpopulation is caused by number of factors. Reduced mortality rate, better medical facilities, depletion of precious resources are few of the causes which results in overpopulation. A direct result of this has been increased lifespan and the growth of the population.

1)High birth rate
2) low death rate
3) Immigration.
Are the three main causes of increasing population.

Causes of Increasing Population:

Population growth is a complex phenomenon influenced by various factors. While the population size can fluctuate due to both natural and human-induced factors, there are several notable causes that contribute to the increasing population worldwide. Let's delve into the details:

1. High Birth Rates:
- Improved Healthcare: Advances in medical technology, increased access to healthcare facilities, and better sanitation have reduced infant mortality rates and increased life expectancy. Consequently, this leads to higher birth rates as more children survive into adulthood.
- Cultural and Social Norms: In certain cultures and societies, having larger families is considered desirable or necessary for various reasons, such as economic support, social status, and religious beliefs. These cultural and social norms can influence individuals' decisions to have more children.

2. Declining Death Rates:
- Medical Advancements: The development of vaccines, antibiotics, and medical treatments has significantly decreased mortality rates, especially for diseases that were once fatal. This has led to an overall decline in death rates.
- Improved Sanitation: Access to clean water, proper sanitation facilities, and hygienic practices have also played a crucial role in reducing mortality rates, particularly from waterborne diseases.

3. Migration:
- Urbanization: The migration of people from rural areas to cities is a significant driver of population growth. Urban areas tend to provide better employment opportunities, education, healthcare, and access to various amenities, attracting individuals to relocate.
- Conflict and Displacement: Political conflicts, wars, and natural disasters often force people to leave their homes and seek refuge in other regions or countries. These displaced populations contribute to the growth of the areas they settle in.

4. Lack of Education and Family Planning:
- Limited Access to Education: In regions with low literacy rates and limited educational opportunities, people might have less knowledge about family planning methods, leading to larger family sizes.
- Limited Access to Contraception: Inadequate availability and affordability of contraceptives contribute to unintended pregnancies and higher birth rates.

5. Economic Factors:
- Poverty: Poverty can often lead to higher birth rates as families rely on children for labor and to support them in old age. In impoverished regions, limited access to education and healthcare further exacerbates the situation.
- Economic Growth: Paradoxically, rapid economic growth can also contribute to population growth. Improved living conditions, increased job opportunities, and higher incomes can lead to a boost in birth rates.

It is important to note that the causes of increasing population can vary by region and are influenced by a complex interplay of social, economic, cultural, and environmental factors. Understanding these causes is crucial for implementing effective population management strategies and promoting sustainable development.