In Little League dugouts, community parks, professional athletic organizations, and international soccer leagues, on college campuses and neighborhood playgrounds, even in residential yards, the question being asked is “grass or plastic?” The debate is over synthetic turf, used to blanket lawns, park spaces, and athletic fields where children and adults relax and play; the questions are whether synthetic turf is safe for human and environmental health, and whether its advantages outweigh those of natural grass. Despite or perhaps because of the fact that it is too early to definitively answer those questions, the debate is fierce. New York City, which buys the largest amount of synthetic turf of any U.S. municipality, held a hearing 13 December 20007 on the use of synthetic turf in city parks. There is a clear need for open space in the city. The 28,700 acres of land constituting some 4,000 parks are distributed unevenly throughout the city. “Many districts have no green parks, not even one,” said Helen Sears, a city council member representing the Jackson Heights neighborhood, during the hearing. New York City Department of Parks & Recreation commissioner Adrian Benepe wants to address the need for parks and athletic fields by installing not only natural grass fields and lawns but also synthetic turf. “With quality recreational facilities—which means, in some cases, synthetic turf fields—we will be able to better confront this issue,” he says. In New York City, he points out, at least 35 synthetic turf fields are or will be a replacement for asphalt surfaces. Others oppose the move toward synthetic turf. “Grassroots organizations have been working hard to have pesticide use reduced or banned in places where it is unnecessary,” says Tanya Murphy, a board member of Healthy Child, Healthy World, an advocacy organization. “Now we’re going from the frying pan and into the fire when replacing grass with synthetic turf.” The debate leaves many on the fence. Orlando Gil, an assistant research scientist at New York University and soccer coach, is weighing both alternatives: “We want children to play outside, exercise, and play sports, but with pesticides and fertilizers in grass and chemicals in artificial turf, I don’t know which to choose.” Indeed, a dearth of research on the nonoccupational human health effects of exposure to the constituents of synthetic turf hampers the ability to make that choice with any degree of confidence. On the basis of limited toxicity data, some reports have concluded the health risks are minimal. Most agree, however, that far more research is needed before the question can be definitively answered. In the 13 December 2007 issue of Rachel’s Democracy and Health News, William Crain of the City College of New York Psychology Department and Junfeng Zhang of the University of Medicine & Dentistry of New Jersey School of Public Health called conclusions of minimal risk “premature.”