In Latin America, a quarter of the urban population live in slums and the youth population in urban areas is larger than it has ever been and growing.
"Rising fuel prices and the increasing concentration of the population in urban areas is bringing about serious logistical problems for the delivery of food, " he says.
He urged the government "give consideration to whether gull contraceptives could be applied and whether these could be an effective way of limiting the burgeoning population in urban areas".
More than half the world's population already lives in cities and the urban population of sub-Saharan Africa is projected to double by 2030.
The objective of World Water Day 2011 is to focus international attention on the impact of rapid urban population growth, industrialization and uncertainties caused by climate change, conflicts and natural disasters on urban water systems.
The most affluent, Hartford, has among the lowest urban population densities in the world.
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Out of this, 47% of the urban population are actually people who have migrated from rural areas.
Li Ling of Peking University estimates that more than half of the urban population has no insurance.
One study has suggested that the tax system alone reduces the population density in urban areas by 15%.
At present, over two-thirds of Pakistan's parliamentary constituencies are rural, with the urban population supposedly still a minority.
However, urban areas, although better served than rural areas, are struggling to keep up with urban population growth.
In 1970, around 20% of the population lived in urban centers around China.
The continent's urban population is also projected to exceed that of China and India by 2050, according to U.N. figures.
Political power in such countries almost always rests with the urban population, not those out in the woods growing cocoa.
And China is able to maintain its export-led economic growth, generating jobs for its growing urban population, while continuing to attract foreign investment.
They are essential for the study of medieval attitudes towards piety, and the spiritual needs and wellbeing of an urban population in the middle ages.
Hengshui is located in Hebei, a neighboring province to Beijing, and has an urban population of 460, 240, and a total population of 4, 340, 373.
That means that the amount of urban land will double in only 19 years, whereas the urban population will double in 43 years.
On the up side, though, New York state's per capita income ranks 16th nationally, and its urban population makes heavy use of public transportation.
The construction of residential and commercial buildings in the country is expected to grow at strong rates over the coming years driven by a rising urban population.
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Climate change is likely to cut rainfall in the Great Lakes basin, while ever more water will be drawn from the lakes by a rising urban population.
"If 33% of (the) urban population lives in slums -- they may live in sub-human conditions, but still, they are a drain on the economy, " he said.
We do know for a fact that factors as diverse as climate change and aging populations mean that even as the global urban population continues to grow, some cities are shrinking.
The urban population of the world is forecast to grow to 6.3 billion people in 2050 from 3.4 billion in 2009, representing both population growth and net migration from countryside to city.
Liu Zhi, director of the municipal commission for population and family planning, told China Daily on Saturday that the city plans to start extensive research into the characteristics of the urban population.
In fact, we believe these new P2P services could be more complementary and encourage more people to consider car sharing programs over car ownership in dense urban population, which in the end could help Zipcar.
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Chicago came in second, due largely to its dense urban population, crippling traffic and the fact that motorists in the Windy City are subjected to fuel costs that are 30 percent higher than the U.S. average.
Universal service funds (USF) are set up by levies on telecoms in individual countries, which are then used to increase consumer access based on criteria such as income distribution, rural and urban population ratios, literacy and geography.
During the consultations governance challenges in arid and semi-arid areas were discussed and how institutions can be better equipped to deal with risks and uncertainties, emerging out of climate change, population growth, urban-rural tensions and groundwater pollution.
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