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February 22nd, 2005
As more and more nano-based consumer products arrive, scientists are beginning to worry that these unpredictable particles are holding back a few surprises -- ones that could harm human health or the environment.
Some science interest groups, HESI among them, also contend that while many outstanding questions remain, it's hardly time to sound the warning bells. "I don't necessarily believe that there's a need to be alarmist -- we have been exposed to some of the materials for a while," says Thomas. "But certainly there's enough novelty and enough new [production] going on that it's worth evaluating."
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