Exposure to levels of BPA, a chemical found in baby bottles, food can linings, that U.S. deems harmless over course of lifetime triggers reproductive problems in female rats, study shows. Chemical trade group says study is irrelevant because chemical was injected, not swallowed. And: EPA hearing will examine whether BPA should be added to California's Proposition 65 list of chemicals known to cause cancer or reproductive toxicity (click 'See also').