GreenTracker| Scientists say that a charcoal-like substance called Biochar can significantly offset 1.8 billion metric tons of carbon emissions annually, or about 12 percent of global emissions.
The carbon-packed substance was first suggested as a way to counteract climate change in 1993. It’s made from decomposing biomass-like plants, wood and other organic materials in a process called slow pyrolysis. Unlike most biomass, that breaks down to release its carbon into the atmosphere within a decade or two, biochar can hold its carbon for hundreds, perhaps thousands of hears. via Science Daily
Biochar was used by the Amazonian Indians to enhance soil fertility centuries ago.