Online Desk | Update: 11:37, Jul 30, 2015

The current world population of 7.3 billion is expected to reach 8.5 billion by 2030, 9.7 billion in 2050 and 11.2 billion in 2100, according to a new UN DESA report titled “World Population Prospects: The 2015 Revision”.

The UN report said this  on its website on Wednesday.

“Understanding the demographic changes that are likely to unfold over the coming years, as well as the challenges and opportunities that they present for achieving sustainable development, is key to the design and implementation of the new development agenda,” Wu Hongbo, UN Under-Secretary-General for Economic and Social Affairs, quoted to have  said on the website.

The report mentioned that most of the projected increase in the world’s population can be attributed to a short list of high-fertility countries, mainly in Africa, or countries with already large populations.

It added during 2015-2050, half of the world’s population growth is expected to be concentrated in nine countries — India, Nigeria, Pakistan, Democratic Republic of the Congo, Ethiopia, United Republic of Tanzania, United States of America (USA), Indonesia and Uganda, listed according to the size of their contribution to the total growth.

It further said India expected to become the largest country in population size, surpassing China around 2022, while Nigeria could surpass the United States by 2050

China and India remain the two largest countries in the world, each with more than 1 billion people, representing 19 and 18 % of the world’s population, respectively.

But by 2022, the population of India is expected to surpass that of China.

Currently, among the ten largest countries in the world, one is in Africa (Nigeria), five are in Asia (Bangladesh, China, India, Indonesia, and Pakistan), two are in Latin America (Brazil and Mexico), one is in Northern America (USA), and one is in Europe (Russian Federation). Of these, Nigeria’s population, currently the seventh largest in the world, is growing the most rapidly. Consequently, the population of Nigeria is projected to surpass that of the United States by about 2050, at which point it would become the third largest country in the world. By 2050, six countries are expected to exceed 300 million: China, India, Indonesia, Nigeria, Pakistan, and the USA.

During this period, the populations of 28 African countries are projected to more than double, and by 2100, ten African countries are projected to have increased by at least a factor of five: Angola, Burundi, Democratic Republic of Congo, Malawi, Mali, Niger, Somalia, Uganda, United Republic of Tanzania and Zambia.

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