Cities such as Raleigh, Charlotte, Austin, Dallas and Houston enjoy among the country's fastest growth rates in the under-15 population.
The results are visible in increasing levels of public dissatisfaction in Britain with waiting lists in the health service, congested roads and trains, over-crowded classrooms and an under-educated population.
The under-60 U.S. population is expected to grow for at least 50 years while the under-60 populations in Japan and Europe are already declining and in China will turn down within a decade.
The biggest challenges will lie in Africa - where agricultural productivity has been falling and 30% of the population is permanently under-nourished.
At least 1.7 million people -- nearly a quarter of Cambodia's population -- died under the 1975-1979 Khmer Rouge regime from execution, disease, starvation and overwork, according to the Documentation Center of Cambodia.
Conservation efforts and trap-and-transfer programs, in which turkeys were caught and moved to under-populated areas, brought the population back to healthy levels by the 1960s.
Professor Stephen Glaister, director of the RAC Foundation, said the government was looking for radical solutions to the "chronic problems" of congestion and rising traffic levels due to population growth and under-investment.
The most obvious source of new votes for Democrats in future is not white men but the fast-growing (though under-registered for voting) Latino population who, outside Texas and Florida, vote Democratic by two to one.
In a region where nearly two-thirds of the population is under the age of 30, an emerging generation is struggling to reconcile convention with a unique vision for their future.
And Saudi Arabia has such a young population - 45% are under 15 - that foreign workers make up more than half of the total workforce, according to some estimates.
Furthermore, the government has encouraged citizens to go on-line for education and business purposes, hoping that a well-educated and entrepreneurial population, under strict state supervision, will lead to greater regional and global influence, increased economic opportunities and foreign investment.
These higher costs on young people are especially significant because about two-thirds of the uninsured population is under the age of 40.
With a state takeover of Detroit, nearly half of the state's African-American population will live in a city under state control.
Working under 150, 000 supervisors they administered Oral Polio Vaccine (OPV) to children in numbers equal to the entire population of Pakistan (almost 172 million under-five children).
The proportion of those interviewed who could speak Welsh was higher than that in the general population, but the results were then adjusted to make them reflect the linguistic make-up of Wales, where just under 19% of the population can speak Welsh.
States with high population of the disadvantaged groups also show that they are under-represented in ownership of businesses.
Over 40% of the Saudi population is under 14 years old with 18% between 15-24, so similar events are plausible.
However, Russia has also made a great deal of under-appreciated progress in addressing these problems to that point that its natural population change is noticeably better than the largest member of the European Union.
FORBES: Germany's Demographic Crisis Is Now Worse Than Russia's
The Centers for Medicare and Medicaid Services, the federal agency overseeing the programs, has warned that between 2015 and 2021, health spending is set to grow at an average annual rate of 6.2% as a result of the aging of the population, expansion of access to care under the federal health-care law, and an improvement in economic conditions.
In many conflict-affected countries, over 60% of the population is aged under 25, but education systems are not providing youth with the skills they need to escape poverty, unemployment and the economic despair that often contributes to violent conflict.
The changes emphasize managed care over fee-for-service care, with a goal of having nearly the entire Medicaid population under some kind of managed care by 2014.
FORBES: New York Medicaid Reforms Intended to Improve Health at Lower Cost
Most single mothers operate under extreme social and economic impediments -- triple the poverty rate of the rest of the population, the highest rate of low-wage employment, the worst wage gap, the lowest net worth, the highest risk of bankruptcy -- that add up to a massive inequality in American society.
Most Madurese in West Kalimantan came to the province under the government's transmigration program, and make up 1%-2% of the population.
In a country where the white population makes up just under 10% of the population the XV which started the World Cup final contained two non-white players.
Without huge improvements, according to a decade-old official estimate, by 2050, when its population will be a shade under 1.7 billion, India will run short of water.
In Slovakia they make up under 10% of the population, but fill fully 60% of places in schools for special-needs children (that may not be purely the result of discrimination: some parents shun mainstream schools because of endemic bullying).
Tories were "very much like the rest of the population - decent, tolerant, humane but desperately concerned to see the criminals brought under control, to see decent citizens back in charge of our neighbourhoods, " Mr Letwin told BBC One's Breakfast with Frost programme.
Work is under way to clone and otherwise increase the population of Sumatran rhinos, which presently number only about 200-300 in the wild.
The urban poor living in such settlements under terrible conditions of squalor, crime, and insecurity now make up 30-40%t of the population of cities such as Manila, Jakarta, Mexico City, and Lagos.
应用推荐