Delhi to overtake Tokyo as world's most populous city by 2028: UN report: Two-thirds of people in this globe is all set to live in cities by 2050, and the boom will be concentrated and determined in three countries - India, China, and Nigeria, as per the United Nations estimate released on the last Wednesday.
The UN report predicted an extra 2.5 billion people living in ever-expanding cities in the next 30 years, with as much as 90% of the urban growth centred on Asia and Africa.
The urban population of the world has grown rapidly from 751 million in 1950 to 4.2 billion in 2018. Urbanization will lead to a decline in Russia's rural population from 36.8 million to 22.1 million.
Today, 55% of the world's population lives in urban areas, a proportion that is expected to increase to 68% by 2050.
"The increasing concentration of people in cities provides a way of more economically providing services".
Tokyo is now the world's largest city with 37 million people, followed by Delhi with 29 million, Shanghai with 26 million, and Mexico City and São Paulo, each with around 22 million inhabitants.
Not all cities will see growth, the report highlights Nagasaki and Busan, in Japan and South Korea respectively, as having undergone population decline since 2000, as have several cities in eastern Europe.
Tokyo is now the largest city on the planet with 37 million inhabitants, followed by New Delhi with 29 million, Shanghai with 26 million and Sao Paulo and Mexico City with 22 million apiece. Of this, India has the largest, at 893 million people, followed by China's 578 million.
This increased pressure is giving rise to so-called megacities - those with more than 10 million inhabitants. However, some of the fastest-growing urban agglomerations are cities with fewer than a million inhabitants, many of them located in Asia and Africa. DESA stresses that sustainable urbanisation is essential to successful development.
The growth is caused by an accelerating shift from rural to urban living across the world, particularly in Asia, which despite hosting some of the world's largest cities has lagged behind other parts of the world in terms of overall urbanization.
In 32 years, India will be among the countries with highest growth in world's urban population, according to the United Nations.
At the same time, linkages between urban and rural areas will need to be strengthened, building on their existing economic, social and environmental ties, the report concludes.
Population Division director John Wilmoth said: "When urban growth is rapid, insuring access to housing, water, sanitation, electricity, public transport, education and health care for all is especially challenging".