Also,do not build up mulch around the base of trees or plants like a volcano.

VOA: special.2009.06.30

The tiny silicon wires stick up from the base,or substrate, looking something like a microscopic hair brush.

VOA: standard.2010.02.19

The man in the newly released video , is identified as Humam Khalil Abu-Mulal al-Balawi, who blew himself up inside a key U.S base in an eastern Afghan region bordering Pakistan.

VOA: standard.2010.01.09

"It could be taken up by crustaceans like shrimp crabs, things like that which are the base of the food chain and that could be passed up to fish and then mammals and the toxins could be concentrated and that could be harmful to animals that feed on these smaller organisms."

VOA: standard.2010.05.09