Four unions representing most of the U.S. Environmental Protection Agency’s scientists, attorneys, and other specialists, citing what they consider to be repeated instances of broken pledges or bad faith on multiple issues by Administrator Stephen Johnson—including refusal to enforce the agency’s Principles of Scientific Integrity on the California greenhouse gas waiver decision and other environmental issues—served notice in a February 29 letter that was released by Public Employees for Environmental Responsibility that they will secede from the agency’s labor-management cooperative forum.