We Irish are used to invasions. Vikings, Normans, the British we've seen them all come and go – or come and stay. Now we've got another one on our hands, by the exotic name of Chalara fraxinea. This ...
Pennsylvania’s ash trees are under attack by an invader from Asia. The emerald ash borer, a small green beetle, arrived several years ago in the United States in cargo ships, hidden away in wooden ...
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