From 1997 to 2003, there was a decline of 50 percent in the proportion of children nine to twelve who spent time in such outside activities as hiking, walking, fishing, beach play, and gardening, according to a study by Sandra Hofferth at the University of Maryland.

Children need nature for the healthy development of their senses, and therefore, for learning and creativity.

The pleasure of being alive is brought into sharper focus when you need to pay attention to staying alive.

As a species, we are most animated when our days and nights on Earth are touched by the natural world. We can find immeasurable joy in the birth of a child, a great work of art, or falling in love.

Studies of children in playgrounds with both green areas and manufactured play areas found that children engaged in more creative forms of play in the green areas.

Nature-deficit disorder describes the human costs of alienation from nature, among them: diminished use of the senses, attention difficulties, and higher rates of physical and emotional illnesses. The disorder can be detected in individuals, families, and communities.

I do not mean to imply that the good old days were perfect. But the institutions and structure--the web--of society needed reform,not demolition. To have cut the institutional and community strands without replacing them with new ones proved to be a form of abuse to one generation and to the next. For so many Americans, the tragedy was not in dreaming that life could be better; the tragedy was that the dreaming ended.