The ash clouds include particles of rock, glass and sand that can get into an aircraft's engine and cause it to stall.

VOA: standard.2010.04.17

But he says it is cause for concern because it is a new strain, and people have not built up an immunity to it.

VOA: standard.2009.05.01

He says the government is committed to blocking demonstrations in downtown Islamabad because it cannot tolerate having protesters indefinitely shut down the city center for their political cause.

VOA: standard.2009.03.15

Still,doctors say it is possible that such events might cause symptoms of Parkinson's to appear earlier than they would have.

VOA: special.2009.04.07

It belongs to the same family of bacteria as those that cause tuberculosis and Hansen's disease, also known as leprosy.

VOA: special.2009.04.06

But she says it must be shown scientifically that cord blood stem cells cause improvement, and not other reasons.

VOA: special.2011.02.01

Jeff said it was a sad thing to think that they were the cause of the breaking of a woman's heart.

VOA: special.2010.04.24

"I offer Catholic Mass,' cause I'm a Catholic priest by profession,and so it is actually the feast day of Mary,Mother of God.

VOA: special.2009.12.28

It can also cause flooding. Wind speeds in a category two hurricane can reach close to one hundred eighty kilometers an hour.

VOA: special.2010.08.24

Although hot weather just makes most people feel hot, it can cause serious medical problems, even death.

VOA: special.2010.07.27

The central bank would reject policies that it thought might cause bankers to take too much risk.

VOA: special.2009.10.30

Or,they said, it would cause freed slaves to move north and take away jobs from whites.

VOA: special.2009.10.08

And on the other hand, if the monsoon is particularly heavy it can cause extensive flooding.

VOA: special.2010.05.25

High stress levels have been found to cause asthma attacks that make it difficult to breathe.

VOA: special.2009.03.24