FILE PHOTO: Biochar helps South African farmers bury carbon and

FILE PHOTO: Clayton Postma, founder of Regenr8, holds pellet-sized samples of micronised volcanic rock and a combination of organic biochar, called Regenr8, designed to reduce fertiliser dependency, on a wheat farm in Riviersonderend, South Africa, September 2, 2025. REUTERS/Shafiek Tassiem/File Photo