Nature deficit disorder

Nature deficit disorder refers to the phrase coined by Richard Louv in his 2005 book Last Child in the Woods that human beings, especially children, are spending less time outdoors resulting in a wide range of behavioral problems. This disorder is not recognized in any of the medical manuals for mental disorders, such as the ICD-10 or the DSM-5. Evidence was compiled and reviewed in 2009. Richard Louv has stated "nature-deficit disorder is not meant to be a medical diagnosis but rather to serve as a description of the human costs of alienation from the natural world."