The Environment in Focus
A white ash tree stands beside my front porch in Baltimore -- its trunk nearly as thick as I am tall, and its branches stretching at least three times the height of my three-story house, shading one side of my roof to the other.It’s about 200 years old, and it started growing back when this section of the city was still farmland beside a stream, decades before the Civil War.
The Environment in Focus
Globalization and Invasive Species Take Toll on America's Trees
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