"Passion does not arrive on videotape or on a CD; passion is personal. Passion is lifted from the earth itself by the muddy hands of the young, it travels along grass-stained sleeves to the heart. If we are going to save environmentalism and the environment, we must also save an endangered indicator species: the child in nature."

— Richard Louv, Last Child in the Woods: Saving Our Children from Nature Deficit Disorder, 2005