According to UN data , the number of megacities with a population of over 15 million people will jump from 22 in 2011 to 35 in 2025 , this transition presents challenges to the economy , budgets , infrastructure, environmental and social policies , reports Bloomberg.
The statistics also showed that the number of people living in cities by 2050 will double to nearly 6.4 billion people. If Tokyo was the country after 10 years it will be the 31st largest in the world, and China has set a goal to urbanize 250 million rural dwellers .
"From global warming to homelessness , from debt crisis to energy shortages , water scarcity to any other problem affecting human society - the cities are in the spotlight ," said Professor Geoffrey West of the Santa Fe Institute in New Mexico . "Cities , however, may well be our best hope of finding a solution to these major challenges , as they are the center of innovation , ideas and wealth ," he said .
Mayor Parks Tau of Johannesburg draws attention to the importance of planning. "We have a long-term vision ," he said . "Of course changes can be made in the course of events , but it is important to have a clear vision of the direction in which a city is going ."
India, which has three cities with a population over 17 million people , the Minister of Public Works Kamal Nath said the authorities should focus on promoting the development of the suburbs.
His compatriot Tedzhpret Chopra , former director of General Electric Co. India is of the opinion that cities should pay particular attention to young people. "If these people are not secured , the state loses talent and can not meet their needs ," he says .
Architect Steven Cairns of Future Cities Laboratory in Singapore warns that governments must be cautious about the additions of projects from other countries that are no longer relevant , such as high buildings.
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