Overpopulation or overabundance is a phenomenon in which a species' population becomes larger than the carrying capacity of its environment. This may be caused by increased birth rates, lowered mortality rates, reduced predation or large scale migration, leading to an overabundant species and other animals in the ecosystem competing for food, space, and resources. The animals in an overpopulated area may then be forced to migrate to areas not typically inhabited, or die off without access to necessary resources.Judgements regarding overpopulation always involve both facts and values. Animals often are judged overpopulated when their numbers cause impacts that people find dangerous, damaging, expensive, or otherwise harmful. Societies may be judged overpopulated when their human numbers cause impacts that degrade ecosystem services, decrease human health and well-being, or crowd other species out of existence.
Source: Overpopulation (wikipedia.org)
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India's population has reached 1,425,775,850 people, surpassing the number of people in mainland China, according to the UN's estimates. India's decennial census - scheduled to be held in 2021 - has been delayed, so there's no official population data.
India is set to overtake China to become the most populous country in the world, data released by the United Nations shows. India's population is pegged at 1,428.6 million against China's 1,425.7 million by the middle of the year.
Couples in China's Sichuan province will be allowed to have as many children as they want, as the country continues to try and get a grip on its declining population. Last year, the population in China fell for the first time in 60 years.
Japan's prime minister says his country is on the brink of not being able to function as a society because of its falling birth rate. Japan - population 125 million - is estimated to have had fewer than 800,000 births last year. In the 1970s, that figure was more than two million.
China's population has fallen for the first time in 60 years, with the national birth rate hitting a record low - 6.77 births per 1,000 people. The population in 2022 - 1.4118 billion - fell by 850,000 from 2021.
The UN says the world's population has hit eight billion, just 11 years after passing the seven-billion milestone. After a big surge in the middle of the 20th Century, population growth is already slowing down.
India is set to become the world's most populous country next year, overtaking China with its 1.4bn people, according to UN figures. By this November, the planet will be home to 8bn.
Pope Francis has suggested people who choose to have pets over children are acting selfishly. The Pope's comments came as he was discussing parenthood during a general audience at the Vatican in Rome.
Ziona Chana, the head of a religious sect that practiced polygamy, died on Sunday, leaving behind 38 wives, 89 children and 36 grandchildren. The news was confirmed by Mizoram's chief minister, Zoramthanga, who offered his condolences on Twitter "with a heavy heart".
China has announced that it will allow couples to have up to three children, after census data showed a steep decline in birth rates. China scrapped its decades-old one-child policy in 2016, replacing it with a two-child limit which has failed to lead to a sustained upsurge in births.
image copyrightGetty ImagesA major new study published in the Lancet medical journal suggests falling fertility rates mean nearly every country could have shrinking populations by the end of the century, and warns of a "jaw-dropping" impact on societies.
The world is ill-prepared for the global crash in children being born which is set to have a "jaw-dropping" impact on societies, say researchers. Falling fertility rates mean nearly every country could have shrinking populations by the end of the century.
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China's birth rate has fallen to its lowest since the formation of the People's Republic of China 70 years ago - despite the easing of the much criticised one-child policy. The birth rate was 10.48 per 1,000 in 2019 - the lowest since 1949, the National Bureau of Statistics said.
The global population is higher than the Earth can sustain, argues the Director of the British Antarctic Survey in the first of a series of environmental opinion pieces on the BBC News website entitled The Green Room.
There are already too many people living on Planet Earth, according to one of most influential science advisors in the US government. Nina Fedoroff told the BBC One Planet programme that humans had exceeded the Earth's "limits of sustainability".
Over the next week the BBC News website will be looking at the issues raised by the growth in the world's population. But how are these changes affecting people's daily lives? BBC News speaks to seven people from around the world to hear their stories.