Invasive plants and animals are an expensive problem in the United States -- federal agencies spent more than $104 million last year to control them. But a recent study on invasive garlic mustard shows that it might sometimes be better to leave invasive species alone.
The Christmas spirit is popping up along the waters of the Great Lakes region. In Port Huron, Mich., Santa Claus rode to shore on the Huron Spirit , a boat operated by the Lakes Pilots Association. In Toledo, Ohio, the tug Josephine brought him to the National Museum of the Great Lakes. But the most poignant event of the holiday season was in Chicago , where the sinking of "The Christmas Tree Ship" was remembered recently.
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Last of three parts On a rainy day, City Forester Jeanne Grace takes me on a tour of the City Cemetery where tall, evergreen trees hang over many of the graves. Hemlock trees. The cemetery has the peace and quiet of any cemetery, but if you take a closer look at the hemlocks -- reeeal close -- you’ll spot the hemlock woolly adelgid.