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Rise in Human Population
World population is defined as the total number of living humans on Earth. The world population has experienced continuous growth since the end of the Great Famine and the Black Death in 1350.
As of June 2013, there are over 7 billion people sharing this planet. According to statistics provided by the United States Census Bureau, the world population exceeded 7 billion on October 31, 2011.
In 1000 AD, the human population was estimated at 400 million. By the year 1750, world population had doubled to 800 million! In the year 1850, the world population had exceeded one billion people, and in 1950, the population topped two billion.
The highest rates of growth (in which the global population increases above 1.8 per cent, per year) had peaked during the 1960s-1970s. The growth rate peaked at 2.2 per cent in 1963, and declined to 1.1 per cent by 2011.
Every second, five people are born and two people die; resulting in a net gain of three people. There are 56 million deaths per year, and by 2040 this figure is expected to increase to 80 million per year!
The global fertility rate average is to 2.5 children per woman. At this rate, population can grow to 11 billion by 2050, and nearly 27 billion by 2100.
According to the World Factbook, nearly 4.7 billion people live in low and middle-low income economies, versus high-income countries that have a combined population of one billion less than one-sixth oof the world’s population.
Every year, the world population is growing by about 0.8 per cent, or nearly 80 million people. 55 per cent of children under the age of five, living in Sub-Saharan Africa, have never been registered with an identity. Worldwide, nearly 50 million children each year are not registered with any form of identity.
The effects of human overpopulation poses multiple determinants. The increase of natural resources leads to overconsumption and various, economic obstacles.
According to a recent, United Nation report, the world is unable to sustain increasing population growth. This is because overpopulation can cause irreversible damage to the ecosystem; resulting in a shortage of food, water and energy resources. If overpopulation continues, by 2030 we will need to replenish the world with 50 per cent more food and 30 per cent more water, along with 45 per cent more energy.
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