Factors Contributing to the Population Explosion:
• The green revolution
Agricultural advances have insured that no one has to starve. For thousands of years, the Earth's carrying capacity depended on the available food supply. That is no longer the case.
• Advances in medicine
Disease has throughout history always been the definitive factor in the limiting of the human population. However, medical research has largely controlled (or eliminated) such diseases as smallpox, malaria, & cholera. As a result, death rates have declined dramatically.
• The industrial revolution
An increase in the availability and use of technology has lead to a more densely packed society that attempts to make room for an ever increasing population. The influx of new technology into the global market over the past 150 years has made life generally easier in the industrialised nations of the world and led to promising social situations that provoke the tendency of people to have more children.
• Other factors:
• In some countries people lack awareness of birth control or the ability to limit the size of their families. Recent United Nations statistics indicate that 90% of women in 10 African nations had not heard of contraception.
• People in some developing countries who do want to limit the growth of their families lack access to contraception or reproductive-health services. Family planning methods are simply not available in large sections of the world. As many as 500 million women in developing countries live too far from health centers to obtain contraceptives, & unsafe abortions kill an estimated 70,000 women a year.
• Human reproduction is a matter of great religious and cultural importance as well. The religious teachings of many people prohibit or discourage contraception. And some cultures traditionally value large families as a sign of prestige and power.