Scientific research on the mechanisms to address global warming and its consequences continues to proliferate in the context of an accelerating climate emergency. The concept of climate action includes multiple meanings, and several types of actors employ its use to manage the crisis. The term has evolved to incorporate many of the suggested strategies to combat global warming offered by international bodies, states, nongovernmental organizations, the private sector, and social movements. The present work offers a classification scheme to build a shared understanding of climate action through a lens of environmental justice and just transitions developed by sociologists and others. The classification system includes major institutional and noninstitutional forms of climate action. By identifying the primary forms of climate action, analysts, scholars, policymakers, and activists can better determine levels of success and how different forms of climate action may or may not complement one another in the search for equitable solutions in turning back the rapid heating of the planet.