Many organizations and individuals influence not only whether we institute a policy to deal with an environmental issue but also the design of that policy—what it covers and how it will be implemented and enforced. The wide variety of voices, many representing differing viewpoints, can make it difficult to create new policies. Though political ideologies might influence how one goes about addressing a problem, policy makers ideally look to the best available science when making decisions about whether a policy is needed to protect the health and well-being of the public and environment.