Kelly Zimmerman holds her son Jaxton Wright at a parenting session at the Children's Health Center in Reading, Pa. The free program provides resources and social support to new parents in recovery from addiction, or who are otherwise vulnerable. Natalie Piserchio for NPR hide caption

Rice within the octagon in this field is part of an experiment to grow rice under different levels of carbon dioxide. Toshihiro Hasegawa, National Agriculture and Food Research Organization of Japan hide caption

Sukup Manufacturing Co.'s thriving factory outside tiny Sheffield, Iowa, gives the town an economic anchor. But that hasn't stopped the population numbers from slipping. Frank Morris/KCUR hide caption