Asian countries need help to build cities that can cope with the region’s “unprecedented” urban expansion of more than 100,000 people a day over the next two decades, the Asian Development Bank said yesterday.
Half of Asia’s population will be living in cities by 2020, as some 1.1 billion people move to urban environments over the next 20 years, ADB president Haruhiko Kuroda said at a conference on sustainable cities in Singapore.
“Asia’s rapid urbanization is unprecedented,” Kuroda said. “Providing jobs and services while improving the livelihood and quality of life for so many city dwellers is an urban management task of a magnitude never before attempted by humanity.”
“For most major cities in Asia, growth rates are too rapid for their own infrastructure to keep up with and the benefits of new investments and infrastructure have not been distributed equally,” Kuroda said.
Kuroda said that there is a US$30 billion shortfall every year in the maintenance of urban infrastructure in the region, leading to greater deterioration of the existing infrastructure — more than half a billion Asians live in slums and air pollution is affecting the health of millions.
By 2015, more than half of global greenhouse gas emissions will come from cities in Asia, Kuroda said.
“Clearly, Asia’s cities need assistance in coping with the physical impact of past and current urban growth,” he said.
As cities expand, they should plan the development of suburbs in advance to avoid congestion and environmental problems, a study from the Manila-based bank said.
Traffic congestion and emissions could be reduced with public transportation.
The study also said that cities needed to better control their waste and improve sewer systems, particularly as deforestation and climate change suggest that cities should plan for more frequent and intense flooding in the future.
Sewers should be constructed where densities are more than 100 persons per 1 hectare. Alternatively, a sanitation system made up of septic tanks and storm water or drainage systems could be viable, the study said.
Providing access to safe drinking water and proper sanitation is another challenge that many Asian countries face, Kuroda said.
He warned that the health, social and economic costs of the region’s deteriorating water quality are likely to be high already and will only rise further if improvements are not made. He said there is greater urgency now for countries to tackle problems with water supply management in both urban and rural settings.
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