Nitrogen runoffs from farms can create large dead zones, like those in the Gulf of Mexico.

VOA: special.2009.07.28

The mountain supports five vegetation zones and many kinds of animals.

VOA: special.2009.04.22

Health officials say that setting up command posts in the disease zones will allow more precise monitoring of the outbreaks.

VOA: standard.2009.09.14

from the pay of military sergeants to the need to reduce the number of Russian time zones.

VOA: standard.2009.11.12

"What the federal government does, has a huge impact on where we build in coastal zones, how we farm, what our infrastructure looks like."

VOA: standard.2010.06.14

Despite a massive deployment of armed forces and federal police in drug trafficking zones, some 4,000 people have been killed in Juarez during the past two years.

VOA: standard.2009.12.18

Secretary of State Hillary Clinton will also be at the U.N.this month, attending a Security Council session expected to adopt a resolution expanding the protection of women in conflict zones.

VOA: standard.2009.09.02

So just as no-smoking zones have expanded over the years, she suggests that city planners, for example,should consider whether their decisions might promote or hinder the development of personal relationships.

VOA: standard.2010.07.29

He says ground troops need to secure drop zones for the heavy pallets of water, food and medicine, and that they need vehicles and other capabilities to secure and distribute the aid.

VOA: standard.2010.01.19