"[P]yrolysis of biomass to produce char for carbon sequestration has multiple benefits... The product... is... called or Agri-char, sometimes (dark earth)... Trials in Australia have produced a doubling... or tripling of crop production... [C]har is likely to retain some... , , and ... Biochars are very porous... taking up and holding moisture. ...By ...stimulating plant growth, biochar has a double impact... First, it... sequesters carbon. Second... increased growth of plants removes CO, from the atmosphere..."