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Ignorance is
not bliss: "Innocence about science is the worst crime today." - Sir Charles Percy Snow, scientist and novelist |
No
one disputes that there will be many positive benefits from nanotech, but
what about the bad? Is nanotech ultimately worth the costs, like
electricity and probably nuclear energy? Or is the price too high, as
in the case of asbestos and DDT? ▉ Health: Nanoparticles have been shown to be absorbed in the livers of research animals and even cause brain damage in fish exposed to them after just 48 hours. If they can be taken up by cells, then they can enter our food chain through bacteria and pose a health threat like mercury in fish, pesticides in vegetables or hormones in meat. The increasingly-popular carbon nanotube (20x stronger and lighter than steel) looks very much like an asbestos fiber – what happens if they get released into the air? Being carbon-based, they wouldn’t set off the usual alarms in our bodies, making them difficult to detect. ▉ Environmental: If nanomaterials really are as strong as diamonds, how decomposable or persistent are they? Will they litter our environment further or present another disposal problem like nuclear waste or space litter? In the distant future, will self-replicating nanobots – necessary to create the trillions of nanoassemblers needed to build any kind of product – run amok, spreading as quickly as a virus, in the infamous “gray goo” scenario? ▉ Privacy: As products shrink in size, eavesdropping devices too can become invisible to the naked eye and more mobile, making it easier to invade our privacy. Small enough to plant into our bodies, mind-controlling nanodevices may be able to affect our thoughts by manipulating brain-processes. ▉ Terrorism: Capabilities of terrorists go hand in hand with military advances, so as weapons become more powerful and portable, these devices can also be turned against us. Nanotech may create new, unimaginable forms of torture – disassembling a person at the molecular level or worse. Radical groups could let loose nanodevices targeting to kill anyone with a certain skin color or even a specific person. ▉ Society: With all the potential abuses of nanotech, many experts advocate a strong system to regulate and monitor nanotech developments. But because nanotech laboratories can be small and mobile, surveillance needs to be practically everywhere – devolving a free society into a Big Brother scenario. Also, what is the impact on the economy? If nations can make anything they want, will they lose all incentive to trade? What about morality – should we be playing with god-like powers? And
there are many other possible impacts that people are worried about.
(See our article
here for more discussion.) Given
a laundry list of pros and cons, what now? Can we weigh the good
versus bad to see whether we should move forward with nanotech or not?
The answer might not be that simple: |
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