NICOLE WALKER is the author of the books Processed Meats, The After-Normal: Brief, Alphabetical Essays on a Changing Planet, Sustainability: A Love Story, Where the Tiny Things Are, Egg, Micrograms, and Quench Your Thirst with Salt. You can find her at https://www.facebook.com/nicole.walker.18041 Twitter: @nikwalkotter and website: nikwalk.com.