The White House's most recent budget request included more funding to study health and environmental questions related to nanotechnology. But some experts say lawmakers in Congress need to go a step further and pass new legislation to regulate the emerging field. During today's OnPoint, J. Clarence Davies, senior research fellow at Resources for the Future and former assistant administrator for the U.S. EPA under President George H.W. Bush, explains why existing environmental laws aren't sufficient to cover nanotech. Davies, also a senior advisor to the Woodrow Wilson Center's Project on Emerging Nanotechnologies, details his recent testimony before a Senate panel and the growing use of nanotech in consumer products.