Biochar is charcoal made for the purpose of adding to the soil. Or biological charcoal. It was used by indigenous people in the Amazon to keep soils fertile for hundreds of years. It removes carbon from the atmosphere when produced using modern techniques. When applied to the soil, it brings a host of benefits to that soil and the plants growing in it. Plants that are healthy and thriving perform photosynthesis more efficiently, meaning that they’re then more effective at capturing carbon. This creates an upward spiral of system health in which carbon is being moved from the air, where it’s a problem, and puts it in the soil, where it’s a resource. As system health improves, productivity and performance improve.