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Clouds of sulphurous gases swirled around the crater and fissures opened up in the rock just metres away, revealing molten rock below.

On China's frenetic and hugely popular retail livestreams, glamorous hosts sell goods ranging from shoes and lipsticks to baby products and, increasingly, truckloads of sulphurous coal.

The Russian nationalist leader was a senior lawmaker whose sulphurous rhetoric and antics alarmed the West but appealed to Russians’ aggrievement and wounded pride.

From time to time the sea would flare with a soft sulphurous light where forty feet down Oiler was working with the cuttingtorch.

The air was oppressive; it seemed as if there was some sulphurous fume, which at times made me dizzy.