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TREE-KILLING BUG CONTINUES TO SPREAD

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An adult ash borer. The tree-killing bug has now been found in Toronto. (Photo courtesy of the Michigan Department of Agriculture)

Since arriving in North America in the 1990's, the emerald ash borer has largely been contained to the upper Midwest. But now scientists say the destructive beetle is spreading. Noah Ovshinsky has more:

Info from the Canadian Food Inspection Agency