Drones monitor spread of Emerald Ash Borer
Emerald Ash Borers may be small insects, but they can do big damage to trees. They're highly destructive -- and if they infect an ash tree, the tree will die unless it's chemically treated. Some researchers in Colorado -- are using drones, to try to track
- Jul 20, 2017, 8:37 p.m.
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- Jul 20, 2017, 6:00 p.m.