This is the latest installment of Harvest Public Media’s Field Notes , in which we talk about important issues related to food production. Maybe you didn’t notice the last time you bought a popcorn and coke at the movie theater or warmed up a bag of popcorn in the microwave, but the retailers that brought it to you took a big hit from the 2012 drought. The drought caused one of the worst popcorn harvests in recent memory. In this week's episode of Field Notes, Harvest Public Media’s Peter Gray