Nearly a million kilograms of nano-particles are produced and used each year in the U.S. alone, the story says - with virtually no government oversight. Labeling and safety compliance are generally left to manufacturers, while some government officials say they don't want to interfere in the industry's progress. The global market for the particles was $254 billion in 2005 and is expected to grow 10-fold by 2014. The 2011 U.S. federal budget has earmarked $1.8 billion in spending on nanotechnology.
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