A protective coating of colloidal silver is painted on the inside and outside of the filter to kill bacteria.

VOA: special.2009.06.22

The Nazis had a plan to kill all the Jews of Europe, but they permitted Freud to go to England.

VOA: special.2010.04.13

It helped raise public awareness of the dangerous use of chemicals to kill insects and the pollution of the environment.

VOA: special.2010.12.15

Democrats in the Senate have lost their sixty-vote supermajority needed to block any effort by Republicans to kill legislation.

VOA: special.2010.02.27

Some of the children reportedly were forced to kill or harm other children while part of the Lord's Resistance Army.

VOA: special.2009.06.01

Boric acid has been used to kill other insects including cockroaches, termites and ants inside homes since the middle of last century.

VOA: special.2011.02.23

But in Monroeville and around the country, fans of "To Kill a Mockingbird" are celebrating its fiftieth anniversary.

VOA: special.2010.07.08

To do this,he had to urge Congress to kill a law which forced the government to buy silver.

VOA: special.2010.06.24

He seemed to kill for no reason, and with no emotion, as if taking someone's life meant nothing.

VOA: special.2009.12.13

In eighteen seventy-two, a famous American word expert decided that the time had come to kill this word.

VOA: special.2010.08.08

The fast was to protest the poisoning of grape workers and their children by the dangerous chemicals growers used to kill insects.

VOA: special.2009.09.06

These include vaccination campaigns and the use of bed nets chemically treated to kill mosquitoes that spread malaria.

VOA: special.2009.09.28

But it warns that mosquitoes are becoming increasingly resistant to pesticides, the products used to kill insects.

VOA: special.2009.05.26

He says the fields will be treated to kill the fungus and to stop it from spreading.

VOA: special.2009.08.18