Glare and other forms of light pollution are recognized by the American Medical Association (AMA) as a public health issue of concern. On 15 June 2009 the AMA adopted a resolution to support the reduction of light pollution caused by outdoor artificial lighting, citing its implication in disrupting human and animal circadian rhythms as well as its “strongly suspected” role in suppressed melatonin production, depressed immunity, and increased rates of certain cancers. The AMA pledged in the resolution “to develop and enact a policy that supports light pollution reduction efforts and glare reduction efforts at both the national and state levels.”