Nature-deficit disorder severely hampers, if not fully blocks, development of environmental literacy. Environmental communicators, educators and interpreters talk about their work as an 'antidote' or 'cure' for nature-deficit disorder.

The store failed because all of the manager's friends were free riders who drove paying customers away.

The water steamed and bubbled around me. I felt a rush of gratitude for it, that it should well up out of the mountain, bathe my aching body, and unthaw my frozen limbs.

As early as 1898 I proposed to representatives of a large manufacturing concern the construction and public exhibition of an automobile carriage which, left to itself, would perform a great variety of operations involving something akin to judgment.