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Highland Park has 4,125 ash trees trees on public parkway and about 2,000 more on publicly maintained areas like bicycle trails, according to TribLocal. The plan calls for removing all ash trees and replacing them with another kind, according to the Highland Park News. The newspaper reports that chemical treatment is not part of the plan.
Emerald ash borer is an exotic beetle that was discovered in southeastern Michigan near Detroit in the summer of 2002, according to Emerald Ash Borer Info. The larvae feed on the inner bark of ash trees, disrupting the tree's ability to transport water and nutrients, the site reports. Since its discovery, the beetle has killed millions of trees.