When it comes to invasive plants, tree of heaven is public enemy number one. This week on the show, we get to the bottom of its bad reputation. We’ll discover which parts are science, and which parts are straight up racism.  Human Nature is sponsored by BetterHelp and our listeners get 10% off their first month of online therapy at BetterHelp.com/nature Support for this podcast is made possible by Gordon and Dona Crawford, who believe that quality journalism makes Los Angeles a better place to live. This program is made possible in part by the Corporation for Public Broadcasting, a private corporation funded by the American people.