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The wildlife conservation charity WildAid live-streamed history's biggest-ever ivory cremation as part of a campaign to help save elephants from extinction.

Grey London was the ad agency that helped arrange the ceremony in Kenya on 30 April, on Periscope in the UK but also on Wechat in China. More than 100 tonnes of ivory, worth about $105 million (£71 million), was burned during the cremation.