A Tougher 21st Century Elm Makes A Comeback

There are thousands of Elm Streets in America, but not many surviving elms, for which the streets were named. Starting in the mid-20th century, Dutch elm disease killed off millions.

Now, as beetle invasions and new disease are threatening other tree species, ecologists are engineering a comeback for the elm, whose history in the U.S. goes back to the earliest settlement by Europeans.

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