Biochar is a carbon-rich substance produced during pyrolysis of various types of biomass, which has become a multifunctional product with far-reaching implications on soil health, nutrient cycles, and environmental sustainability worldwide. In addition to its classical use as a soil amendment, biochar is actively involved in the regulation of key biogeochemical cycles (carbon, nitrogen, phosphorus, sulfur, and micronutrients) and has been demonstrated to influence ecosystem processes. Organic carbon in soil and biochar supports long-term carbon sequestration as opposed to release the greenhouse gases, especially such as the co/the methane. Its high surface area, porosity, and alkalinity promote nutrient retention, alter soil pH, and increase availability for micronutrients like nitrogen and phosphorus. Moreover, biochar interacts with sulfur compounds and micronutrients by decreasing toxicity and alleviating deficiency through adsorption and buffer effects. It is also important in causing soil microbial communities and enzyme activity to accelerate nutrient transformation processes, such as nitrification, denitrification, and phosphorus solubilization. Nonetheless, the scale and nature of these advantages are highly contextualized depending on the type of feedstock, state of pyrolysis, and environmental uses. This chapter reviews recent developments found in current research, restates, and maps possible courses of future improvement of biochar-based interactions in ecosystem management. Finally, biochar provides a bright opportunity to improve the biogeochemical cycle and add the sustainable agriculture, climate stability, and global environmental recovery.