From the clean environment of a microchip factory to the engineer who lifted a city to install sewers, Steven Johnson traces the journey from dirty to clean in our lives. Show more
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From the clean environment of a microchip factory to the engineer who lifted a city to install sewers, Steven Johnson traces the journey from dirty to clean in our lives. Show more
BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.
