http://www.slate.com/articles/arts/movies/2015/08/z_for_zachariah_starring_margot_robbie_chiwetel_ejiofor_chris_pine_reviewed.html

In Z for Zachariah, newly acquainted Ann (Margot Robbie) and John (Chiwetel Ejiofor) sit on the front porch of her old family house, discussing the natural disaster that has decimated most of civilization, save for them. John suggests that something unusual in the weather patterns has protected the valley from the toxins and radiation that have crippled life everywhere else. “Crazy it’s still here,” he says in wonderment at the lush, thriving farmland around them. Ann describes her father’s words prior to his leaving with her brother to search for survivors (they never returned): “God was looking out for them.” “Nothing crazy about that,” she says matter-of-factly in her plucky Southern accent, a small smile on her face.