Demonstration on how to make charcoal briquettes, by Amy Smith of D-Lab, MIT . The charcoal is made from agricultural waste materials using an oil drum. In this case maize stalks were used. The charcoal is compressed to briquettes using a simple hand-operated press. The demonstration was held during the IPIDAT 2009 meeting.
Benefits of bio-char to soil is still debatable as shown in the following videos: