The Great Nutrient Collapse

Plants rely on both light and carbon dioxide to grow. If shining more light results in faster-growing, less nutritious plants, then it seemed logical to assume that ramping up carbon dioxide might do the same. What might that mean for the plants that people eat?

Can American Soil Be Brought Back to Life?

A new idea: If we revive the tiny creatures that make dirt healthy, we can bring back the great American topsoil. But farming culture — and government — aren’t making it easy.