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Adam Hart investigates yet another threat to the ash trees of Europe. In the last programme he found out about the latest research developments to save ash trees from ash dieback, a disease that has already devastated trees across Europe, but now it seems that another threat could be on its way from Russia – the emerald ash borer. This beetle already targets ash trees in the USA and kills 99% of the trees it infests. But, what is it, how great is the threat and is there any way to stopping it spreading to Europe?
Image: Emerald Ash Borer Traces Credit: Cornelia Schaible
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