Ecologists Engineer Comeback For The American Elm

There are thousands of Elm Streets in America, but not many surviving Elm trees for which the streets were named. In the mid-20th century, Dutch elm disease killed off millions of the species. Today, new invasive pests and diseases are killing off other species of trees. And so ecologists are engineering a comeback for the American Elm.

Jill Kaufman (@JillK885NEPR) from New England Public Radio reports.