How Taylor Swift made friendship bracelets cool again with royals and Olympians wearing them - but critics them they're not eco-friendly and businesses report bead shortages

Sian said: 'When trends like this explode, they often lead to a flood of single-use items that are quickly discarded. With 5.3 million tickets sold over 84 international shows, across 19 countries, the quantity of these plastic friendship bracelets being exchanged is staggering. 

'Already, 20 million metric tons of plastic litter end up in the environment every year. We know the impact of plastic all too well – it never truly goes away. 

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