Rhinehart means sustainable from an environmental perspective in this argument. The main things he wants to do to differentiate is to make it cheaper (ensure c

Rhinehart means sustainable from an environmental perspective in this argument. The main things he wants to do to differentiate is to make it cheaper (ensure complete is $9.00, at walmart, for 1400 calories; his current goal is $5.00 per day, around 2400 kCal), scalable (recipe will be open sourced once complete), and environmentally sustainable (things that can be manufactured on a billions of servings scale).