After the potato plants appear, organic mulch can be spread around to hold moisture, help suppress weed growth and cool the soil.

VOA: special.2009.03.10

Smithson wanted his money to be given to the United States to start an organization in Washington designed to increase and spread knowledge.

VOA: special.2010.10.22

Dr.Strebel says the Millennium Development Goal aimed at reducing child mortality by two-thirds by 2015 will be missed if measles outbreaks continue to spread.

VOA: standard.2010.05.21

"For the health sector, it will be to be ready to cope with a disease, which will spread in areas where they do not spread or which may become more serious,".

VOA: standard.2009.08.30

Not only will we do a better job of treating patients, but,we will be helping to prevent the potential spread of resistance to artemisinins, our most important class of medicines for treating malaria."

VOA: standard.2010.03.09

The Mexican tourist, who is in stable condition, is the only case of swine flu in Hong Kong so far, but Dr.Chow says the city should not be complacent, because the virus continues to spread worldwide.

VOA: standard.2009.05.08

They are not working in a coordinated fashion, but certainly they have got the message that if they don't do something soon, then the turmoil that we are seeing in Greece could easily spread to other countries and that it will be harder to turn around."

VOA: standard.2010.05.25