U.S. Government Delays Nanotechnology Safety Measures

Want to buy a bag of carbon nanotubes—in quantities from a few grams to hundreds of kilograms (100 kilograms = approximately 220 pounds)? With a credit card and Internet access, you can. But is the U.S. government doing enough to ensure the safety of these materials and the hundreds of other nanotechnology commercial and consumer products currently on the market?