This essay examines the evolution and impact of the environmental justice movement. It begins by tracing its origin and growth, highlighting key milestones, groundbreaking studies and pivotal research efforts which helped launch the movement. The essay presents three distinctive case studies of environmental injustice across the U.S.: Cancer Alley in Louisiana, Love Canal in New York, and Hunter's Point in California. These case studies illustrate the stark realities of environmental injustices experienced by marginalized communities, showcasing the enduring struggles despite notable court victories and federal interventions. The analysis continues by reviewing contemporary initiatives taken to address environmental injustices, emphasizing state and federal policy reform, and the work of grassroots organizations. Finally, the essay concludes by reaffirming the urgency of comprehensive action in addressing environmental injustices.