I thought this brief biochar roundup from the National Association of State Foresters is interesting. Potential positive climate impact?
The benefits of using biochar as a fertilizer and long-term carbon sequestration technique are well-documented. A new study suggests that adding biochar to cattle feed can improve animal health and feed efficiency, reduce nutrient losses and greenhouse gas emissions, and increase soil fertility when applied as fertilizer. Recently the Nebraska Forest Service found that the inclusion of less than 1% biochar into the diet of cattle can lead to a 10% reduction in their methane emissions.
Biochar also holds promise for industrial applications. Researchers at the National University of Singapore have concluded that adding only a small amount of biochar to concrete can increase its strength by up to 20% and make it 50% more watertight. And when biochar is added as a concrete supplement, up to six metric tons of wood waste could be recycled and reused in the construction of a 1,076-square-foot home.
Other research suggests that adding 5% biochar by weight to 3D printing polymers improves tensile strength by up to 60%. And that biochar is an excellent, low-cost method of removing contaminants from water that could prove extremely beneficial to public health (particularly in low-income communities).