In this photo taken on March 29, 2014, Beijing artist Liang Kegang collects fresh air in the commune of Forcalquier in Provence, France. The jar of air is a piece of conceptual art to protest his home city's choking pollution. It has fetched $860 in a small auction. (AP Photo/Liang Kegang)

BEIJING (AP) — Beijing artist Liang Kegang returned from a business trip in southern France with well-rested lungs and a small item of protest against his home city’s choking pollution: a glass jar of clean, Provence air.

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