The differences involved their economies, their systems of labor, and their way of life.
VOA: special.2009.05.07
They found the highest levels of solar activity cause small, but far-reaching effects on weather systems around the world.
VOA: special.2009.09.29
The study says mangrove trees provide more than one and a half billion dollars worth of services to ecological systems worldwide.
VOA: special.2010.04.20
As part of the plan, the Army Corps of Engineers built roads, canals and water-control systems throughout South Florida.
VOA: special.2010.09.21
Others carried out energy studies of city school buildings to make sure the equipment and systems work effectively.
VOA: special.2009.09.04
Reports say the study may lead to better predictions of temperatures, rainfall and the intensity of weather systems.
VOA: special.2009.09.29
Lawmakers in the United States have expanded an investigation into the use of location-tracking systems on mobile devices.
VOA: special.2011.05.02
Chris Howson says many of the causes of preterm births are related to poverty and weak health-care systems.
VOA: special.2009.10.19
Also,the IMF says the activity of these trading systems is largely outside the reach of market regulators.
VOA: special.2011.01.14
Their ancient languages contain a great deal of information about environmental systems and species of plants and animals that are unknown to scientists.
VOA: special.2009.12.02
Technical and mechanical systems are also responsible for getting the news of huge waves to threatened areas.
VOA: special.2009.03.17
He says the financial crisis should be seen as a wake-up call to change systems and ways of thinking, and to re-establish trust.
VOA: special.2009.01.23
A recent policy discussion in the journal Science compared the nutrient balances of different agriculture systems.
VOA: special.2009.07.28
Huge organizations like the United Nations or International Monetary Fund might provide millions of dollars in aid to build systems in a developing country.
VOA: special.2010.06.16
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