Deadly olive tree disease across Europe 'could cost billions' (BBC)
Researchers say the economic costs of a deadly pathogen affecting olive trees in Europe could run to over €20 billion. They've modelled the future worst impacts of the Xylella fastidiosa pathogen which has killed swathes of trees in Italy. Spread by insects, the bacterium now poses a potential threat to olive plantations in Spain and Greece. The disease could increase the costs of olive oil for consumers.