Smaller is Not Similar
The Senate is currently considering a bill to reauthorize the 21st Century Nanotechnology Research and Development Act (S. 3274) which allocates over $1.6 billion in taxpayer funding for nano research with no funds specified for environmental, health and safety protection. Take action to ask the Senate to include adequate funding for health and safety research on nanotechnology.
Nanotechnology. It’s a word we’ve been hearing for a while, describing what sounds like the wave of the future, building stuff tinier and tinier, so eventually we can have miniscule robots to climb into our mouths and brush our teeth for us. Right?
Well, no. It’s not quite like that. Nanotechnology is the process of manipulating matter at a molecular level—or nanoscale. Nanomaterials have at least one dimension that is 100 nanometers or less. A nanometer is one billionth of a meter—approximately 1/100,000 of a human hair.
So while there is some research afoot to build tiny machines, the type of nanotechnology we’re talking about consists of engineering materials at the molecular level to create smaller versions of substances. The technology has potential applications in healthcare, electronics, water filtration, food and agriculture, and consumer goods, to name a few. It can be used to create advanced materials that can make a surface water-repellent, anti-microbial, or electrically conductive, among other things. Nanomolecules are already being used in products from sunscreen and stain-resistant clothing to food and food packaging—over 600 nanoproducts are already on the market, with sales of over $50-88 billion in 2007. Products that contain nanotechnology are not required to be labeled, and they go largely unregulated.
In May, Food & Water Watch joined a group of organizations to petition the FDA to stop the sale of nano-silver because it is potentially dangerous to human and environmental health. Nano-silver, currently the most commonly commercialized nanomaterial, can act as a pesticide and an antimicrobial, and can leach into water and negatively affect marine ecosystems, killing off both harmful and beneficial microorganisms.
Now, preliminary reports have shown that carbon nanotubes, another type of nanoparticles used in sporting goods (tennis rackets, bike frames, etc), are carcinogenic in the same way as asbestos.
Not enough is known about nanomaterials for them to be widely used in commercial products. Some evidence shows that nanoparticles can be more completely absorbed by the body and may be taken up by organs and tissues. We have certain barriers in our bodies that function to keep dangerous things out of delicate places—for instance, the blood-brain barrier, and the placental barrier. Those barriers have been pretty good at protecting our brains and our fetuses thus far in the history of people. But when you have tinier particles, those barriers may not be as effective. Imagine rinsing couscous in a regular pasta strainer.
And it’s not just their size in relation to us—nanoparticles interact differently with the whole environment. Nanoparticles have different properties than their macro-sized counterparts. Food & Water Watch’s fact sheet “Sweating the Small Stuff” explains that nanoscale particles have “distinct electronic, magnetic, chemical, and mechanical properties.” They are more reactive and can even be explosive.
Food & Water Watch recommends that the government (EPA, FDA, and other relevant agencies) regulate all nanotech products as new chemicals, and the substances should be subject to more research and testing before being released into commercial products. The Senate is currently considering a bill to reauthorize the 21st Century Nanotechnology Research and Development Act (S. 3274) which allocates over $1.6 billion in taxpayer funding for nano research with no funds specified for environmental, health and safety protection. Take action here to ask the Senate to include adequate funding for health and safety research on nanotechnology.
