The study in Benin found that solar-powered pumps are effective in supplying water, especially during the long dry season.

VOA: special.2010.01.11

"If I felt that I could have been increasingly effective in that job, I suppose I would have continued to do it.

VOA: special.2010.05.09

He says there is clear evidence of the kinds of policies and programming interventions that can be most effective in combating the problem.

VOA: special.2010.05.17

He says the study shows that, in theory,white roofs could be effective in reducing urban heat.

VOA: special.2010.03.02

But recent findings suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.09.22

Scientist Ian Wilson at the Scripps Research Institute in California says the antibodies proved highly effective in laboratory mice exposed to deadly levels of virus.

VOA: special.2009.03.04

But recent findings have suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.08.12

In another study, the vaccine was effective in reducing clinical malaria by thirty-five percent.

VOA: special.2010.04.20

He believes the treatment could also be effective in human beings.

VOA: special.2010.03.16

In fact, I think she is very effective in her job.

VOA: special.2010.01.24

Some medicines are generally effective in preventing and treating malaria.

VOA: special.2009.05.26

On Earth,biological activity is very effective in making methane.

VOA: special.2009.12.30

Two drugs are effective in treating the disease.

VOA: special.2009.05.26

"We found that physical activity was effective in controlling weight only among women who started off with a normal BMI."

VOA: standard.2010.03.30