Ronnie Cummins grew up in a toxic part of Texas so toxic that there are no longer enough classmates to have a high school reunion. He became a human rights activist, and then a food and farming activist. In his new book, Grassroots Rising: A Call to Action on Climate, Farming, Food, and a Green New Deal, he looks at how the food system contributes to climate disruption, and how that can be turned around so that food, health, climate, and communities are improved by healthy agriculture practices.