Tag Archives: Population
The United Nations estimate of future world population is 9.3 million by 2050, rising to 10.1 billion by 2100. However, the U.N. figures are given with a very wide range of uncertainty – between 6.2 billion and 15.8 billion in 2100. A new model developed by a team from the Autonomous University of Madrid (UAM) and the CEU-San Pablo University, both in Spain, indicates that the U.N.'s low estimate for 2100 (a population of 6.2 billion) is more likely – with the population by 2050 being similar to, or even slightly lower than, the present 7.1 billion. Félix F. Muñoz, … Continue Reading
Researchers from the Beijing-based Chinese National Research Institute for Family Planning have reported a method for male contraception that they say is effective, reversible and without serious short-term side effects. In the testing conducted with nine other research centers around China, 1,045 healthy fertile males were injected monthly with 500 milligrams of a formulation of testosterone undecanoate in tea seed oil during a course of 30 months. During the 24-month study period, only 1.1 men per 100 experienced contraceptive failure. After the hormone treatment, the participants’ sperm count returned to normal levels. The tested men experienced mild side effects including … Continue Reading
Sir David Attenborough has become a patron of an organisation that campaigns to limit the number of people in the world. The television presenter and naturalist said that he joined Optimum Population Trust (OPT) because the increase in population was having devastating effects on ecology, pollution and food production. “I’ve seen wildlife under mounting human pressure all over the world and it’s not just from human economy or technology – behind every threat is the frightening explosion in human numbers,” Sir David said. “I’ve never seen a problem that wouldn’t be easier to solve with fewer people, or harder, and … Continue Reading
A recent article published by the Yale School of Forestry and Environmental Studies has debunked a number of myths about population growth. Myth: Population growth rates only decline as countries become wealthy and women become educated. While it is well true that population growth rates have declined most, often below replacement levels, in the wealthy countries of Europe, it is not always realised that they have also declined in many poorer countries. One such country is Bangladesh – one of the poorest countries in the world. Most Bangladeshi girls have little education and marry in their mid-teens, yet the birth … Continue Reading
Before the modern era, life expectancy was no more than 35 years and as low as 20 years in some places. By 1900, life expectancy in the United States had increased to 47 years (which is the current life expectancy in Nigeria). By 2000, it was about 77 years in the United States and more than 80 years in several countries, including Australia.. Life expectancy has increased because of better sanitation and nutrition and through medical advances. If these continue to improve, presumably life expectancy will continue to increase. As people live longer, more advances will occur in their lifetime … Continue Reading
In 1950 the total world population was 2.5 billion. It is now 6.5 billion. It is expected to reach 8.9 billion by 2050 but may then decline to 5.5 billion by the end of the century.