The Supreme Court has rejected Bayer's appeal to shut down thousands of lawsuits claiming that its Roundup weed killer causes cancer. The justices on Tuesday left in place a $25-million judgment in favor of Edwin Hardeman, a California man who says he developed cancer from using Roundup for decades to treat poison oak, overgrowth and weeds on his San Francisco Bay Area property. Hardeman's lawsuit had served as a test case for thousands of similar lawsuits. The high court's action comes amid a series of court fights over Roundup that have pointed in different directions. On Friday, a panel of the U.S. 9th Circuit Court of Appeals rejected an Environmental Protection Agency finding from 2020 that glyphosate does not pose a serious health risk and is "not likely" to cause cancer in humans. The appellate court ordered the EPA to reexamine its finding. At the same time, Bayer has won four consecutive trials in state court against people who claimed they got cancer from Roundup. The latest verdict in favor of the pharmaceutical company came last week in Oregon. The EPA says on its website that there is "no evidence that glyphosate causes cancer in humans." But in 2015, the International Agency for Research on Cancer, part of the World Health Organization, classified glyphosate as "probably carcinogenic to humans." The agency said it relied on "limited" evidence of cancer in people and "sufficient" evidence of cancer in study animals.