The Chicago Teachers Union won a tentative agreement in December that, for the first time, addresses climate and environmental justice demands—making healthy green schools a priority in our city. We achieved this breakthrough even while broader contract negotiations stalled. Finally, in April, we ratified the full agreement, which also includes big raises and lower class sizes. Our environmental justice victory stems from a collaboration between teachers and environmental activists to expose urgent problems facing us and our students—and link those problems to larger struggles.