A jury has found one of the world’s most widely-used weed killers to have been a “substantial factor” in causing a man’s cancer. The unanimous decision, made after five days of deliberations in San Francisco’s federal court, found that Roundup, Bayer AG’s weed killer, was responsible for California resident Edwin Hardeman’s non-Hodgkin lymphoma. It instead allows the trial to proceed to a second phase, which will determine the company’s potential liability and damages.