On the main street of Ljubljana, Slovenia - green capital of Europe - artist Martin Bricelj Baraga set up a sculpture that measures the blueness of the sky. The self-sufficient installation fully operates on solar energy and functions both as monument and as open source software, which visualizes the air quality of the city. The work pays homage to the 18th century ‘Cyanometer’ attributed to Horace-Benedict de Saussure, a Swiss physicist who designed a circular tool to systematically document the blueness on a scale of fifty-three shades of blue, ranging from white to black. See for yourself!
Source: Designboom
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