Plants naturally take in carbon dioxide they need for photosynthesis, the process of changing light energy to chemical energy.

VOA: special.2010.01.26

In general,dead or living parts of plants need to be removed to improve the shape or growth of the plant.

VOA: special.2009.07.14

Drugs that need a doctor's prescription became a bigger part of the debate over health care costs in two thousand three.

VOA: special.2009.08.14

If we do not get enough of the vitamins we need in our food,we are at risk of developing a number of diseases.

VOA: special.2009.04.21

They say levels of a protein called Shh need to remain largely unchanged in a developing fetus for the palate to develop correctly.

VOA: special.2009.12.22

The hunger for news of the Civil War in the eighteen sixties increased the need for reporters.

VOA: special.2009.04.20

But a new study from the University of Aberdeen in Scotland found no need to delay.

VOA: special.2010.08.11

Brian O'Connor of the Family Violence Prevention Fund says young men need guidelines in how to treat young women -- in person or online.

VOA: special.2010.07.15

To do so,a teacher would need to have eyes in the back of his head.

VOA: special.2009.09.06

However,everyone agrees that the city is still in great need of safe and affordable housing.

VOA: special.2010.01.22

He stopped in many places to speak about the need for the League of Nations.

VOA: special.2010.11.18

Over the past year, groups that care for homeless people have seen an increase in the number of people in need because of the nation's economic crisis.

VOA: special.2009.01.28

He hoped he had made the country understand one thing: the great need to forget hatred and bitterness in the difficult time of re-building that would follow the war.

VOA: special.2009.12.31

The huge plantations near Charleston were also in need of rebuilding.

VOA: special.2010.10.04