The world's population is going to exceed 10 billion by 2050. Yeah, that's a lot, and we don't have enough food to feed all these mouths! Fortunately for us, there are a lot of smart people out there creating ways to solve this problem. Vertical gardening in giant warehouses, underwater growing bubbles, vertical farming of kelp, scallops, and other delicious seafood and even traditional food alternatives live Soylent. Warning: steak may be at a premium.