 Biochar, a type of charcoal made from agricultural waste, has been investigated as a way to reduce the environmental impact of grapevine pruning residue. It has been found to have high affinity for low-polar compounds such as caféic acid, galic acid, and olurapine, making it a promising material for recovering these compounds from grapevine pruning residue. This article was authored by Melissa Prilak, Igor Palsik, Danko Kvitten, and others.