A federal jury dealt a huge blow to Monsanto, saying its popular weedkiller Roundup was a substantial factor in causing a California man's cancer. It's the second time in eight months that a jury has reached such a decision. But Edwin Hardeman's case against Monsanto is the first to be tried in federal court. And thousands of similar cases are still pending at the federal or state level. But this trial isn't over yet. While the first phase focused on whether Roundup caused Hardeman's cancer, the second phase ... focuses on whether Monsanto is liable. It's unclear how much the jury might award Hardeman in damages, if anything at all. But last August, in the first state trial over whether Roundup can cause cancer, California jurors awarded former school groundskeeper Dewayne Johnson $289 million in punitive and compensatory damages. A judge later reduced the total award to $78 million. Non-Hodgkin's lymphoma patients who used Roundup started suing Monsanto by the hundreds after a World Health Organization report ... said glyphosate is "probably carcinogenic to humans." While debate continues over whether glyphosate is safe, parts of the country are limiting or banning it, said the US Public Interest Research Group Education Fund. "Following the state court decision last year, we saw a huge uptick in local ordinances that would regulate the use of Roundup on playgrounds, schoolyards and public parks," said PIRG's Kara Cook-Schultz, who leads a campaign to ban Roundup.