In May, President Obama nominated a renowned scientist known as the "father of green chemistry" to head the EPA's Office of Research and Development. For an administration that supports ambitious climate change legislation and stresses the importance of sustainability, the nomination of Paul Anastas, director of Yale's Center for Green Chemistry and Green Engineering and a former White House environment director, was very much in keeping with its broader agenda. Anastas' nomination was unanimously approved in committee in July, and his confirmation seemed all but assured. Yet six months later Anastas still isn't confirmed. Standing in his way is Sen. David Vitter (R-La.), whose block on Anastas' nomination raises questions about Vitter's close ties to the formaldehyde industry.