26 Jan 2012:
Panel Urges Comprehensive
Study Of Nanotechnology Safety
A U.S. scientific panel is calling for a systematic study of the growing use of nanomaterials in industry
, saying little is known about the risk of the microscopic particles increasingly being used in everything
Nanotech: The Unknown Risks
Nanotechnology, now used in everything from computers to toothpaste, is booming. But as Carole Bass
reported in 2008, there were already rising concerns that its development was outpacing our understanding of how to use it safely.
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from cosmetics to clothing and paint. The National Research Council (NRC), part of the U.S. National Academy of Sciences, noted that the use of nanomaterials — measured on the scale of billionths of a meter — is growing rapidly, rising from $225 billion in nanotechnology-based products in 2009 to an estimated $3 trillion by 2015. But the NRC said that little is known about the potential risks
posed by nanomaterials, the pathways and plausibility of exposure, and the severity of such exposure. The NRC called for a systematic research effort
that would identify sources of nanomaterials releases, the different industrial processes that affect exposure and hazards, and nanomaterial interactions from a sub-cellular to an ecosystem level. Nanomaterials — often made from minerals such as gold, silver, carbon, zinc, and aluminum — have unique electrical, chemical, and optical properties. “The number and variety of nanomaterials is just mind-boggling,” said Mark R. Wiesner, an engineering professor at Duke University and a member of the panel.
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
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Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.