Ground-level ozone, often referred to as smog, is front and center on the policy agenda of environmental groups and legislators at all levels of government. Over the past several years, high-profile studies published by the American Lung Association, the Public Interest Research Group (PIRG) and the Clean Air Network (a consortium of environmental advocacy groups) have claimed that ozone is having a severe impact on public health, both nationwide and in North Carolina. These reports have gotten a great deal of media attention but very little media scrutiny.