Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Nature Deficit Disorder, a term coined by Richard Louv in his 2005 book Last Child in the Woods, refers to the alleged trend that children are spending less time outdoors, resulting in a wide range of behavioral problems. Louv claims that causes for the phenomenon include parental fears, restricted access to natural areas, and the lure of the screen. Recent research has drawn a further contrast between the declining number of National Park visits in the United States and increasing consumption of electronic media by children.