• The Centers for Disease Control says HEPA filters are effective in clearing the air of many particles that cause disease.

    VOA: special.2009.07.14

  • Clots can block the flow of blood to the heart or brain and cause a heart attack or stroke.

    VOA: special.2009.10.20

  • The Centers for Disease Control and Prevention says heart disease is the leading cause of death in the United States.

    VOA: special.2010.06.08

  • The goal of the project is to examine in detail how tornadoes are formed and the kinds of damage they cause.

    VOA: special.2010.05.11

  • Several years later, researchers discovered the exact cause of pellagra: a lack of the B vitamin known as niacin.

    VOA: special.2009.01.27

  • The World Health Organization says alcohol abuse is the third leading cause of death and disability in the world.

    VOA: special.2011.03.08

  • Jim Jennings from the Allstate Insurance Company says the number one cause of distracted-driving accidents is the mobile phone.

    VOA: special.2010.07.01

  • The World Health Organization says mosquitoes carry organisms that cause disease and death for millions of people throughout the world.

    VOA: special.2009.05.26

  • We talked last week about a new report on preterm births the leading cause of death in newborn babies worldwide.

    VOA: special.2009.10.26

  • Cardiovascular diseases of the heart and blood vessels are the number one cause of death around the world.

    VOA: special.2009.04.08

  • The two researchers closely studied the records that listed errors involving medicines as the main cause of death.

    VOA: special.2010.07.13

  • Plate tectonics is the area of science that explains why the surface of the Earth changes and how those changes cause earthquakes.

    VOA: special.2010.01.12

  • A recent report in the journal Retrovirology found that xenotropic murine leukemia virus-related virus is not the cause of chronic fatigue syndrome.

    VOA: special.2011.01.18

  • The Agriculture Department says poverty is the main cause of food insecurity and hunger in the United States.

    VOA: special.2009.11.23

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