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Are you breathing carbon nanotubes, and should you be worried?

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http://2020science.org/2015/10/23/are-yo...e-worried/

EXCERPT: For over two decades, carbon nanotubes have been attracting attention. First, they were seen as a super-strong, super-conductive new form of carbon that could potentially revolutionize everything from space travel to drug delivery. Later, concerns were raised that these long, thin, fiber-like materials might cause or exacerbate lung diseases if inhaled.

Now, a new study in the journal EBioMedicine has suggested that these microscopic carbon fibers are ubiquitous in the air many of us breathe every day. And the obvious question that results is: should you be worried?

[...] The authors concluded that carbon nanotube are the main component of inhaled particulate matter.

At first blush, the paper seems alarming – carbon nanotubes that could be harmful were found in the lungs of children with a lung condition. However – as the authors acknowledge in the paper – the results, while interesting, don’t provide evidence that these exposures are a health risk....
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