But pollution is not the only environmental concern with transportation.

VOA: special.2010.01.11

With so much concern over the swine flu, it is hard to believe anyone would want to get it on purpose.

VOA: standard.2009.12.18

So there is concern that we have expressed, and we'll continue to raise with other countries in the region.

VOA: standard.2009.09.15

He says he is pleased with the results, noting the captain's safety was the top concern throughout the crisis.

VOA: standard.2009.04.13

"And,this is of concern to us. We also are concerned about the collateral damage that often results with child victims."

VOA: standard.2009.09.16

The flow of illegal drugs and the violence associated with it is a concern throughout North America.

VOA: standard.2009.08.10

There is concern in Seoul that Pyongyang's insistence on holding bilateral talks with Washington could drive a wedge between the U.S.and South Korea.

VOA: standard.2009.12.08

With London hosting the 2012 Olympics, security is a major concern.

VOA: standard.2010.04.01

The political gridlock is drawing concern that the protest over the restoration of senior judges could further weaken a government already struggling to deal with the country's faltering economy and a strengthening Taliban insurgency.

VOA: standard.2009.03.15