At the same time, the health care needs of aging populations are expected to grow, intensifying the shortage of nurses.

VOA: special.2010.06.07

During this period,many experts warned of mass starvation in the developing world where populations were expanding faster than crop production.

VOA: special.2009.11.10

Pittsburgh was closer to cities on the Atlantic coast with large black populations, cities such as New York, Washington,D.C.and Baltimore.

VOA: special.2010.03.28

It can also rob communities of an important food supply and endanger future populations of some kinds of fish.

VOA: special.2009.02.10

One reason is that overfishing of sharks and related fish has reduced the size of some shark populations.

VOA: special.2009.06.16

The people who used them were some of the first populations to arrive in and settle in Europe.

VOA: special.2009.08.18

But the report lists one hundred eight-four species that are considered in danger because of limited habitat, serious threats or falling populations.

VOA: special.2009.05.12

It says the world also needs to develop better farming methods to feed growing populations in poor countries.

VOA: special.2010.01.05

She gathered studies that showed the harmful effects of DDT, including declining bird populations and increased human cancers.

VOA: special.2010.03.14

Wild animals are considered a top problem for the physical and economic security of rural populations in Africa.

VOA: special.2010.07.27

Miss Carson argued that this kind of pollution would result in ever-decreasing populations of birds and other wildlife.

VOA: special.2010.03.14

For example, permanent populations of Canada geese in North America have increased three hundred percent in eighteen years to four million birds.

VOA: special.2009.04.01

He said the soil improvements are needed "if we are to reduce poverty and feed growing populations."

VOA: special.2009.01.20

But the G8 leaves out developing nations with big populations and growing economies like China,India and Brazil.

VOA: special.2009.10.02