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George Frame

Emerald ash borer tunnels scar an infested ash tree near the Merrimack River in New Hampshire. The invasive borers have killed millions of ash trees in North America over the last decade. Now researchers are releasing a small parasitic wasp in a last ditc

The invasive emerald ash borer has killed millions of trees, but researchers hope a wasp can save some of the survivors

Environment

Ash trees across North America have been falling by the million to an invasive beetle from China, the emerald ash borer. Now scientists in New Hampshire and elsewhere are introducing another bug from China in a last-ditch effort to save some ash trees.

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