In the state of Iowa, Diane Ott Whealy wanted to protect historic plant varieties, like the seeds her great-grandfather brought to the U.S. from Germany more than a hundred years ago.

在爱荷华州，黛安·奥特·惠利希望保护具有历史意义的植物品种，比如她的曾祖父100多年前从德国带到美国的种子。