Professor Drinkwater says farmers need to think about ways to solve some of the causes of nutrient loss from agriculture.

VOA: special.2009.07.28

She says there is no information to explain in detail why tobacco smoke causes behavioral problems in children with asthma.

VOA: special.2009.01.13

The gel contains tenofovir. This is a common anti-retroviral drug used to treat people with HIV, the virus that causes AIDS.

VOA: special.2010.07.21

Fran?oise Barre-Sinoussi was honored with another scientist for research leading to the discovery of H.I.V., the virus that causes AIDS.

VOA: special.2009.05.13

But philanthropy in America also supports many other causes everything from the arts to animal shelters to summer camps for children.

VOA: special.2009.11.02

The study linked almost one in every five such deaths in two thousand eight to the virus that causes AIDS.

VOA: special.2010.04.14

Chris Howson says many of the causes of preterm births are related to poverty and weak health-care systems.

VOA: special.2009.10.19

He says normally a protein in healthy immune cells causes the cells to die after they attack an invading virus or bacteria.

VOA: special.2010.05.19

Stress is more likely to be harmful if you feel helpless to deal with the problem or situation that causes the stress.

VOA: special.2009.03.24

Swaziland is said to have the highest known rate of infection for the virus that causes the disease.

VOA: special.2009.05.04

The researchers did not try to identify the causes of the increase, but they have some theories.

VOA: special.2009.08.06

But it was Darwin who identified and explained the process, natural selection, that causes life to evolve.

VOA: special.2009.02.25

Bunchy top disease causes all of the leaves to grow from the top of the banana plant.

VOA: special.2009.09.21

The studies also appear to show that environmental causes such as viruses or bacteria may be involved.

VOA: special.2009.01.06