People for the Ethical Treatment of Animals (PETA) filed two amicus briefs this week in support of the U.S. Environmental Protection Agency (EPA) after environmental and other groups sued the agency. The first case, Safer Chemicals Healthy Families et al. v. U.S. Environmental Protection Agency et al, before the U.S. Court of Appeals for the Ninth Circuit,revolves, in part, around whether the agency, when evaluating the risks posed by an existing chemical, has discretion under the Toxic Substanc...