AbstractThis chapter describes social injustice in relation to environmental health. It covers the scale and distribution of environmental health hazards, the relationship between social injustice and environmental health, in terms of water contamination, air pollution, soil contamination, food contamination, and exposure to chemicals and global climate and ecosystem change. The chapter also describes the impact of globalization on environmental health. It describes what needs to be done, including achieving environmental justice, creating greater awareness of the cost of environmental hazards, harnessing sufficient political and economic will, reducing exposure to hazardous chemicals, performing epidemiologic research, and reforming organizations and institutions.