When large swathes of invasive seaweed started washing up on Caribbean beaches in 2011, local residents were perplexed.   

Soon, mounds of unsightly sargassum – carried by currents from the Sargasso Sea and linked to climate change – were carpeting the region’s prized coastlines, repelling holidaymakers with the pungent stench emitted as it rots.

Precisely how to tackle it was a dilemma of unprecedented proportions for the tiny tourism-reliant islands with limited resources.

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