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.

We attempt to remember our collective American childhood, the way it was, but what we often remember is a combination of real past, pieces reshaped by bitterness and love, and, of course, the video past--the portrayals of family life on such television programs as "Leave it to Beaver" and "Father Knows Best" and all the rest.

We have such a brief opportunity to pass on to our children our love for this Earth, and to tell our stories. These are the moments when the world is made whole. In my children's memories, the adventures we've had together in nature will always exist.

Here is the beginning of understanding: most parents are doing their best, and most children are doing their best, and they're doing pretty well, all things considered.

By bringing nature into our lives, we invite humility.

As the young spend less of their lives in natural surroundings, their senses narrow, physiologically and psychologically and this reduces the richness of human experience we need contact with nature.

Prize the natural spaces and shorelines most of all, because once they're gone, with rare exceptions they're gone forever. In our bones we need the natural curves of hills, the scent of chapparal, the whisper of pines, the possibility of wildness. We require these patches of nature for our mental health and our spiritual resilience.