Those of you who were in Nantes this summer may have come across an old acquaintance. First commissioned by Triennial Bruges 2015, HeHe’s Undercurrent was on show there in the moat at the Château des Ducs de Bretagne. In idyllic surroundings where there is little if any trace of the city’s industrial and technological revolution, Undercurrent makes a visual and auditory impact. A massive artwork dropped out of the sky into the moat. The work sets you thinking… about our massive use of energy, our energy resources and our changing energy needs, about light and noise pollution, and the demand for sustainable towns and cities, about our heritage.