The food supply is always under pressure. Farmed foods increasingly contain chemicals, vaccines and toxins.
Our advice? Grow your own. This video is an excellent primer on nutrition and calories for plant-based foodstuffs.
Top 9 crops for survival: 1. Beans 2. Corn 3. Squash 4. Cabbage 5. Potatoes 6. Kale 7. Sweet Potatoes 8. Lentils 9. Herbs