Doctors say that over time the damage interferes with the natural exchange of oxygen and carbon dioxide in the lungs.

VOA: special.2010.06.23

To make that genome, the researchers replaced all the natural genetic material in a bacterial cell with a synthetic set of genes.

VOA: special.2010.07.20

Japan's desire to use East Asia to gain natural resources and sell manufactured products was in direct conflict with American plans for Asia.

VOA: special.2011.05.26

The bridge has always been painted "International Orange" because that color went well with the natural surroundings.

VOA: special.2010.07.23

He said his plan would balance the need for energy with the need to protect natural resources.

VOA: special.2010.05.01

Despite the fact the world is green, covered with plants and trees, there is no one natural dye that makes green,a colorfast,permanent dark green."

VOA: special.2011.06.15

David Harrison and Gregory Anderson of Living Tongues say that many endangered languages are spoken by native cultures in close contact with the natural world.

VOA: special.2009.12.02

His main targets were companies that supplied the public with water, electricity,and natural gas.

VOA: special.2010.08.05

Perhaps this is consistent with any study of the natural world."

VOA: special.2011.03.23

But those with weak natural defenses may develop a severe infection.

VOA: special.2009.05.26

Natural gas provides Americans with about one-fourth of their energy.

VOA: special.2009.10.23

He works with the city's American Museum of Natural History.

VOA: special.2009.10.13

That's not going to help them at all, because you have to start with your natural self and grow from that.

VOA: standard.2010.07.22

Analysts say the country needs to adopt the 2010 budget to resume cooperation with the IMF and pay for natural gas imports from Russia.

VOA: standard.2010.02.14