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Once they covered the landscape of the US, but now the country's chestnut trees are on the verge of extinction following.

A fungus infection has wiped out all but a few thousand trees, where once there were billions.

Now scientists hope they have discovered a cure which could save one of the country's favourite trees from oblivion.

Al Jazeera's Imran Garda reports from the Appalachian Mountains in Virginia.

Source: Al Jazeera