Biochar is a type of charcoal that is produced from organic materials such as agricultural waste, wood chips, or manure through a process called pyrolysis. It is used as a soil amendment in agriculture and gardening due to its ability to improve soil fertility, water retention, and carbon sequestration. Biochar has also been studied for its potential to mitigate climate change by capturing and storing carbon dioxide from the atmosphere. Researchers in this area are exploring the various benefits and applications of biochar in agriculture, carbon sequestration, and soil remediation.