The best way to fight climate change is with your diet. We also discuss the importance of healthy soil: did you know soil sequesters more carbon than all plants on earth and our entire atmosphere combined?! Dr. Schwartz explains the concept of "concentration of calories", and why animal agriculture's water and carbon footprints are so high. Dr. Greg Schwartz is a vegan environmental science professor, a former professional football player, and author of Bright Green Future.