science
Biochar can help clean up cadmium from soil—but it might be hiding a problem
July 6, 2026
Scientists tested how two types of biochar from crop waste affect soil when cadmium is present. They grew plants in soil with different amounts of cadmium and added biochar made from either sorghum or sugarcane. The goal was to see if biochar could trap cadmium and what that would do to the soil’s c