68 problems carry growing food

Agriculture contributes some of the collection's starkest adoption gaps: a biocontrol that cuts aflatoxin contamination by 80 to 100 percent yet remains barely used while people get liver cancer, and the world's commercial banana crop facing a rerun of the disease that destroyed its predecessor. Other briefs are measurement problems — telling which degradation stage each hectare of pasture is in, or sensing soil moisture cheaply enough to match how much real fields vary.