The phrase nature deficit disorder was coined in 2005 by author Richard Louv, who argued that the human cost of "alienation from nature" was measured in "diminished use of the senses, attention difficulties and higher rates of physical and emotional illnesses".

BBC: Nature deficit disorder 'damaging Britain's children'

Liberal Democrats should be at the forefront of the crusade against poverty because it wastes human potential and breeds alienation.

BBC: Jackie Ballard: Principle into power