FILE - This undated file photo provided by the Minnesota Department of Natural Resources shows an adult emerald ash borer. North Dakota officials are trying to raise awareness of the emerald ash borer and prevent its spread into the state, which has about 78 million ash trees. Foresters in 30 cities and state parks will be tying ribbons along with informational fliers to publicly owned ash trees next week. (AP Photo/Minnesota Department of Natural Resources, File)
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