Ash dieback , an incurable tree disease , has been detected in the Britain . It threatens UK 's 80 million ash trees , the fourth most abundant tree in the country . It is hoped that Ashtag can play a role in preventing the spread of ash dieback -- and potentially any of the nearly 20 tree diseases in the UK -- to those proportions . A smartphone app called Robert Crowder is providing a way for the public to report diseased trees . 80 million trees have been destroyed in efforts to contain its spread .
Ash dieback , an incurable tree disease , has been detected in the Britain . It threatens UK 's 80 million ash trees , the fourth most abundant tree in the country . A smartphone app called Robert Crowder is providing a way for the public to report diseased trees . 80 million trees have been destroyed in efforts to contain its spread .