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COVID-19 Risk Level for Multnomah County: High Risk

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The Ailanthus altissima tree is commonly known as a Tree-of-Heaven. It can quickly grow to be a big problem. This is a guide to identify it.
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Giant sequoia and coast redwood trees are often found in California. They can also be found growing in Portland's urban forest.
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A brief review of tree parts and how a tree functions.
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Information on tree roots and sidewalks.
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Learn about a selection of trees that keep their leaves all year, and do well in Portland.

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